Category: Twins

Categories: Multiple Births

Landing level category for profiles of persons of twin birth.

There are three types of twins:

  • Identical (Monozygotic) means that the zygote (fertilized egg) formed two separate embryos. Conjoined twins are identical twins with an incomplete separation of cells.
  • Semi-Identical (Sesquizygotic) is where two sperm fertilize one egg. The fertilized egg then splits in two. So, semi-identical twins share all the same chromosomes from their birthing parent (mother), but only 50 percent from their non-birthing parent (father). Semi-identical twins have only recently been discovered and there are so far only two known cases.
  • Fraternal (Dizygotic) means that more than one egg was fertilized. This is typical when fertility drugs were used; but it often occurs naturally as well. Because these twins share a completely different set of chromosomes from both their mother and father, they are genetically just like singleton siblings that just happen to be born at the same time. Twins of different genders are almost always fraternal twins (there are a few sets of different gender identical twins - this is caused by a genetic mutation and is extremely rare).

Fun Fact: Only 1/3 of all twins in the world are identical twins. Fraternal twins make up 2/3 of all twin births.

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Person Profiles (22,784)

Viewing 200 profiles starting with R.
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R

27 Jan 1816 Nijehaske, Friesland, Nederland
27 Jan 1816 Nijehaske, Friesland, Nederland
25 Jul 1873 Bodegraven, Zuid-Holland, Nederland - 08 Feb 1874
25 Jul 1873 Bodegraven, Zuid-Holland, Nederland
04 Feb 1923 Horst, Limburg, Nederland - 12 Oct 1951
04 Feb 1923 Horst, Limburg, Nederland - 09 Mar 1984
20 Feb 1838 Groenekloof, Cape Colony
20 Feb 1838 Groenekloof, Cape Colony
27 Dec 1855 Santa Margherita di Belice, Agrigento, Sicily, Italy
27 Dec 1855 Santa Margherita di Belice, Agrigento, Sicily, Italy - bef 18 Jan 1863
1868 Ebberston, Yorkshire, England, United Kingdom - 1938
abt 1868 Ebberston, Yorkshire, England, United Kingdom
31 Aug 1924 Copake, Columbia, New York, United States - 21 Apr 2009
31 Aug 1924 Copake, Columbia, New York, United States - 02 Dec 2001
15 Jul 1780 Varennes, Province de Québec
11 Aug 1755 Saint-Michel-de-Bellechasse, Canada, Nouvelle-France - 10 Nov 1755
11 Aug 1755 Saint-Michel-de-Bellechasse, Canada, Nouvelle-France
16 Aug 1914 Rotherham, Yorkshire, England, United Kingdom - Sep 2002
16 Aug 1914 Rotherham, Yorkshire, England, United Kingdom
05 Jun 1917 Achille, Bryan, Oklahoma, United States - 24 Mar 1996
05 Jun 1917 Achille, Bryan, Oklahoma, United States - 12 Oct 1995 photo
03 Jan 1896 Nottawa Township, Isabella, Michigan - 04 Jan 1896 photo
03 Jan 1896 Nottawa Township, Isabella, Michigan - 04 Jan 1896
02 Sep 1932 Cremo, Calhoun, West Virginia, United States - 10 May 2014
Living Rader
11 Aug 1886 Little River, Canterbury, New Zealand - 11 Aug 1886
11 Aug 1886 Little River, Canterbury, New Zealand - 11 Aug 1886
1860 Perth, Western Australia, Australia - 1860
1860 Perth, Western Australia, Australia - 1860
28 May 1739 Sainte-Anne-de-la-Pérade, Nouvelle France - 01 Oct 1788
27 May 1739 Sainte-Anne-de-la-Pérade, Nouvelle France - 05 Aug 1739
1878 Hawthorn, Melbourne, Victoria, Australia - 1959
1878 Hawthorn, Victoria, Australia - 23 Jan 1880
16 Apr 1897 Gollubien (Kirchspiel Marggrabowa), Kreis Oletzko, Ostpreußen, Freistaat Preußen, Deutschland - 14 Jun 1897
16 Apr 1897 Gollubien (Kirchspiel Marggrabowa), Kreis Oletzko, Ostpreußen, Freistaat Preußen, Deutschland - 14 Jun 1897
13 Mar 1863 Santa Margherita di Belice, Agrigento, Sicily, Italy
13 Mar 1863 Santa Margherita di Belice, Agrigento, Sicily, Italy - 20 Mar 1863
19 Jul 1880 Brooklyn Township, Hennepin, Minnesota, United States - 18 Jul 1908
09 Feb 1924 Boone, Missouri, United States - 06 Oct 2011
09 Feb 1924 Boone, Missouri, United States - 29 May 2012
1854 Adelaide, South Australia, Australia - 1854
1854 Adelaide, South Australia, Australia - 04 Mar 1929
16 Nov 1915 Clark County, South Dakota, USA - 19 Mar 1997
16 Nov 1915 Clark, South Dakota, USA - 20 Jan 1987
11 Oct 1848 Lewisberg, Marshall,TN - 29 Jul 1866
11 Oct 1848 Columbia, Maury, Tennessee, United States
06 Sep 1881 Washington, District of Columbia, United States - 23 May 1945
06 Sep 1881 Washington, District of Columbia, United States - 06 Sep 1881 photo
01 Jun 1632 Boston, Massachusetts Bay Colony - 12 Apr 1694
22 May 1919 Partridge, Letcher, Kentucky, United States - 20 Mar 1991
22 May 1919 Partridge, Letcher, Kentucky, United States - 09 Dec 2002
29 Mar 1858 Enzberg, Maulbronn, Württemberg, Deutscher Bund - 22 Oct 1858
29 Mar 1858 Enzberg, Maulbronn, Württemberg, Deutscher Bund - 26 Mar 1860
24 Sep 1893 Highworth, Wiltshire, England, United Kingdom - 1972
12 Jun 1834 Campbeltown, Argyll, Scotland - 24 May 1840 photo
12 Jun 1834 Campbeltown, Argyll, Scotland - 28 May 1910 photo
06 Dec 1840 Campbeltown, Argyll, Scotland - 14 Sep 1922 photo
06 Dec 1840 Campbeltown, Argyll, Scotland - 08 Aug 1926 photo
11 Jan 1895 Caledonia Township, Boone, Illinois, United States - 1895 photo
11 Jan 1895 Caledonia Township, Boone, Illinois, United States - 1895 photo
1900 Caledonia Township, Boone, Illinois, United States - 1900 photo
1900 Caledonia Township, Boone, Illinois, United States - 1900 photo
02 Apr 1841 Ohio, United States - 19 Apr 1929
02 Apr 1841 Ohio, United States - 16 Aug 1874
17 Apr 1854 Carntyne, Lanarkshire, Scotland, United Kingdom - 12 Nov 1936
19 Aug 1789 Amsterdam, Noord-Holland, Nederland - 1789
19 Aug 1789 Amsterdam, Noord-Holland, Nederland
09 Jun 1818 - 11 Mar 1897

R cont.

09 Jun 1818 Gallia, Ohio, United States - 12 Mar 1902 photo
14 Dec 1725 Leeuwarden, Friesland, Nederland
14 Dec 1725 Leeuwarden, Friesland, Nederland
11 Jun 1811 Sneek, Friesland, Nederland - 07 Jun 1830
11 Jun 1811 Sneek, Friesland, Nederland - 09 Feb 1838
11 Oct 1639 Aachen, Aachener Reich, Heiliges Römisches Reich
11 Oct 1639 Aachen, Aachener Reich, Heiliges Römisches Reich
19 Sep 1878 Harrison, Clay, West Virginia, United States - 06 Jan 1965
19 Sep 1878 Clay, Clay, West Virginia, United States - 30 Mar 1956
abt Nov 1856 Ealing, Middlesex, England, United Kingdom - abt May 1921
abt Nov 1856 Ealing, Middlesex, England, United Kingdom
19 Sep 1850 Wilna, Jefferson, New York, United States - 10 Nov 1897
19 Sep 1850 New York, United States - 20 Jul 1933
12 Sep 1855 Hahndorf, South Australia, Australia - 28 Mar 1917 photo
11 Dec 1810 Stonington, New London, Connecticut, United States - abt 02 Mar 1880
12 Sep 1855 Hahndorf, South Australia, Australia - abt 1855
17 Mar 1956 Savanna, Carroll, Illinois, United States - 17 Mar 1956
17 Mar 1956 Savanna, Carroll, Illinois, United States - 17 Mar 1956
1845 Melbourne, Port Phillip District, New South Wales (Victoria, Australia)
1845 Melbourne, Port Phillip District, New South Wales (Victoria, Australia) - 23 May 1922
14 Jun 1830 Santa Margherita di Belice, Agrigento, Sicily, Italy - 23 Jun 1830
14 Jun 1830 Santa Margherita di Belice, Agrigento, Sicily, Italy
22 Apr 1867 Santa Margherita di Belice, Agrigento, Sicily, Italy - 26 Apr 1867
22 Apr 1867 Santa Margherita di Belice, Agrigento, Sicily, Italy - 03 Mar 1868
28 Oct 1919 Hanna, McIntosh, Oklahoma, United States - 02 Sep 1977
28 Oct 1919 Hanna, McIntosh, Oklahoma, United States - 05 May 1983
11 Feb 1904 Alès, Gard, France - 17 Jan 2023 photo
11 Feb 1904 Alais, Gard, France - 04 Aug 1905
abt 1880 Dakota Territory, USA
abt 1880 Dakota Territory, USA
22 Dec 1922 Menifee, Kentucky, United States - 02 Aug 2015
22 Dec 1922 Menifee, Kentucky, United States - 28 Jul 1981
14 Feb 1920 Knutsford, Cheshire, England, United Kingdom - aft 1983
14 Feb 1920 Knutsford, Cheshire, England, United Kingdom
20 Dec 1854 Owen, Kentucky, United States - 25 Dec 1930
20 Dec 1854 Owen, Kentucky, United States
14 Aug 1877 Owen, Kentucky, United States - 14 Sep 1947
14 Aug 1877 Owen, Kentucky, United States - 1931
31 May 1829 Chazy, Chazy, Clinton, New York, United States - 1897 photo
31 May 1829 Chazy, Chazy, Clinton, New York, United States - aft 1880
30 Oct 1963 Morgantown, Monongalia, West Virginia, United States - 26 May 2014
Living Rapasky
13 Jun 1908 Beauvais, Oise, France - 02 Jan 1909
13 Jun 1908 Beauvais, Oise, France - 13 Oct 1908
1859 Wooragee, Victoria, Australia
1859 Beechworth, Victoria, Australia - 1860
01 Jun 1824 Sydney, New South Wales, Australia - 01 Oct 1893
1748 Lommerud under Holla Prestegaard, Holla, Telemark, Norge
1748 Lommerud under Holla Prestegaard, Holla, Telemark, Norge - 1757
17 Oct 1876 Errindlev, Fuglse, Maribo, Danmark
26 May 1909 Velsen, Noord-Holland, Nederland - 25 Nov 1995
26 May 1909 Velsen, Noord-Holland, Nederland - 26 May 1909
26 Apr 1879 Velsen, Noord-Holland, Nederland - 27 Apr 1879
26 Apr 1879 Velsen, Noord-Holland, Nederland - 05 May 1879
09 Jul 1802 Jackson, Georgia, United States - Sep 1843
bef 09 Jul 1802 Jackson, Georgia, United States - 1832
Jan 1873 Union, Iowa
Jan 1873 Union, Iowa, United States
12 Sep 1791 Saint-Jacques, Province de Québec - abt 12 Sep 1791
12 Sep 1791 Saint-Jacques, Province de Québec - abt 12 Sep 1791
18 May 1886 Collingwood, Victoria, Australia - 1887
24 Nov 1868 Ballyhaunis, County Mayo, Ireland - 03 Apr 1909
26 Mar 1874 Ballybane, County Roscommon, Ireland - 17 Jul 1955
30 Apr 1938 Pittsburgh, Allegheny, Pennsylvania, United States - 16 Nov 1988
30 Apr 1938 Pittsburgh, Allegheny, Pennsylvania, United States - 13 Feb 1999
Living Ratzloff
Living Ratzloff

R cont.

08 Mar 1917 Chilliwack, British Columbia, Canada - 07 Oct 2011 photo
15 Jun 1856 Hancock County, Ohio, United States - 16 Jun 1856
15 Jun 1856 Hancock County, Ohio, United States - 16 Jun 1856
18 Aug 1914 St Pancras, Middlesex, England, United Kingdom - 2003
18 Aug 1914 St Pancras, Middlesex, England, United Kingdom
01 Oct 1799 New Durham Gore, Strafford County, New Hampshire, United States - 28 Nov 1873
01 Oct 1799 New Durham Gore, Strafford County, New Hampshire, United States - 14 Apr 1804
29 Jun 1897 St. Louis, Missouri, United States
Jun 1897 St. Louis, Missouri, United States
17 Jul 1887 Clay Township, Butler, Pennsylvania, United States - 22 Feb 1979 photo
17 Jul 1887 Butler, Pennsylvania, United States - 25 Nov 1968
1930s Privacy Level: Private with Public Family Tree (Yellow)
Living Ray
17 Oct 1751 La Prairie, Laprairie, Nouvelle France - 31 Oct 1782
06 Feb 1919 Kokomo, Center Township, Howard, Indiana, United States - 07 Feb 1919
1940s - 2010s Privacy Level: Private with Public Family Tree (Yellow)
Living Raym
23 Dec 1921 Texhoma, Sherman, Texas, United States - 25 Jun 2006 photo
06 Apr 1738 Annapolis Royal, Acadie, Colony of Nova Scotia - 04 Dec 1757
06 Apr 1738 Annapolis Royal, Acadie, Colony of Nova Scotia - abt 17 Apr 1771
13 Nov 1910 Mudgee, New South Wales, Australia - 27 Oct 1980
13 Nov 1910 Mudgee, New South Wales, Australia - 08 Jul 1972
31 Aug 1912 Romford, Essex, United Kingdom - 21 Oct 1991
Living Rayner
Living Rayner
Living Rayner
1930s - 1930s Privacy Level: Private with Public Biography and Family Tree (Yellow)
03 Sep 1907 Paddington, New South Wales, Australia - 06 Oct 1962
03 Sep 1907 Paddington, New South Wales, Australia - 04 May 1975
24 May 1920 Mudgee, New South Wales, Australia - 24 Jun 1950
1871 Stockport, Cheshire, England, United Kingdom - 1956
1872 Heaton Norris, Lancashire, England, United Kingdom - 1937
24 May 1920 Mudgee, New South Wales, Australia - 09 Oct 2013
27 Feb 1942 Dunn, Harnett, North Carolina, United States - 27 Feb 1942 photo
27 Feb 1942 Dunn, Harnett, North Carolina, United States - 27 Feb 1942 photo
07 Oct 1894 Benson, Johnston, North Carolina, United States - 28 May 1950
02 Sep 1846 New York - 13 Nov 1917
02 Sep 1846 New York, United States - 16 Feb 1872
15 Jan 1882 Wasco, Oregon, United States - 27 Mar 1960
15 Jan 1882 Wasco, Oregon, United States - 08 Sep 1972
Living Reardon
Living Reardon
17 Oct 1751 Laprairie, Canada, New France - 16 Feb 1824
30 May 1926 Shocco Township, Warren County, North Carolina, United States - 30 May 1926
30 May 1926 Warren County, North Carolina, USA - 30 May 1926
1891 Rochester, Victoria, Australia - 11 Aug 1955
1891 Rochester, Victoria, Australia - 1891
02 Jan 1861 Bergrivier, Cape Colony
02 Jan 1861 Bergrivier, Cape Colony - 24 Nov 1926 photo
26 Mar 1926 Chatfield, Navarro, Texas, United States - 05 Jul 1934
26 Mar 1926 Chatfield, Navarro, Texas, United States - 08 May 2021
04 Jan 1918 Emo, Ontario, Canada - 09 Jan 1918
1910s - 1980s Privacy Level: Private (Red)
abt 25 Jun 1837 Great (or Little) Hale, Lincolnshire, England - 02 Jun 1838
abt 25 Jun 1837 Great (or Little) Hale, Lincolnshire, England - abt Dec 1842
07 Apr 1655 Topsfield, Essex, Massachusetts Bay - aft 17 Aug 1731 photo
07 Apr 1655 Topsfield, Essex County, Massachusetts Bay Colony - 01 Oct 1696
30 Aug 1730 North Farnham Parish, Richmond Co, Virginia Colony - 1773
30 Aug 1730 North Farnham Parish, Richmond Co, Virginia - 01 Jul 1811
09 Sep 1862 Groningen, Groningen, Nederland - 23 Aug 1946
09 Sep 1862 Groningen, Groningen, Nederland - 07 May 1865
1888 Melbourne West, Victoria, Australia - 1970
1888 Melbourne West, Victoria, Australia - 1942
31 May 1903 McCool Junction, York, Nebraska, United States - 31 Dec 1992
31 May 1903 McCool Junction, York, Nebraska, United States - 26 Jul 1971
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