Constable of Abergavenny and Kenilworth Castles 1326
Chief Guardian of the King 1327
Captain-General of the Marches towards Scotland 1327
Councillor of Regency 1345
You can read an excellent biography of Henry, 3rd Earl of Lancaster, at English Monarchs.
Henry ( Plantagenet) was born about 1281 at Grosmont Castle, Monmouthshire. He was the son of Edmund Earl of Lancaster (son of Henry III King of England) and his 2nd wife, Blanche d'Artois, widow of Enrique 1, King of Navarre.
In 1297, he was called Lord of Monmouth. In 1299, he was called Lord Lancaster. His older brother Thomas succeeded his father as Earl of Lancaster, but Thomas was executed by King Edward II and his title and lands were forfeited. Henry called himself Earl of Lancaster in 1326, the title was restored to him in 1327 by Edward III.
Henry married Maud de Chaworth before 2 March 1297. She was the daughter of Patrick de Chaworth and Isabel Beauchamp. (She was born 2 Feb 1282 and died before 3 Dec 1322.)
m.1 ante 2 Feb 1282 or ante 02 Mar 1296/7 (02 Feb 1282 - ante 03 Dec 1322).
Henry "of Grosmont", b. ca. 1300 at Grosmont Castle, Monmouthshire, d. Leicester Castle 24 Mar 1361; m. Isabel Beaumont. When he died he was Duke of Lancaster Earl of Derby, Lincoln and Leicester, Steward of England, Lord of Brigerak and Beaufort
Joan of Lancaster, b. ca.1312, d. 07 Jul 1345, buried Byland Abbey, Yorkshire, m. John de Mowbray (The profile showed that Joan was b. Norfrolk.)
Isabel of Lancaster, b. ca. 1317, d. after 01 Feb 1347. Prioress of Amesbury. (FMG quotes Weir: perhaps married Henry de la Dale in her youth. (Richardson sates that the identification of Isabel as the wife of Henry de la Dale is erroneous.)
Eleanor of Lancaster, b. ca. 1318, d. 11 Jan 1371/2 at Arundel Castle, m1. John de Beaumont, m2. Richard Fitzalan Earl of Arundel
The following children were also included in this profile, with no specific source:
An article by Moriarty states that Henry married second to Alix de Joinvile, widow of Jean, Seigneur d'Arcise-sur-Aube et de Chacenay. This is incorrect. Alix married Henry's brother John.
Henry died on 22 Sept 1345 and was buried at Newark Abbey, Leicester. The profile also stated that he died at the Monastery of Cannons, Newark Abbey, Leicester.
(Royal Ancestry) Sir Henry of Lancaster and Leicester, Lord of Monmouth, died 22 Sept. 1345, and was buried with great state on the north side of the high altar of Newark Abbey, Leicester, Leicestershire,
Douglas, R. (2011). Magna Carta Ancestry: A study in Colonial and Medieval Families, (2 ed, Vol.2, pp.521). Kimball G. Everingham, ed.
Faris, D. (1996). Plantagenet Ancestry of Seventeenth-century Colonists: the Descent from the Later Plantagenet Kings of England, Henry III, Edward I, Edward II, and Edward III, of Emigrants from England and Wales to the North American Colonies Before 1701 (2 ed.). Baltimore: Genealogical Publishing Co., FHL book 973 D2fp., p152.
The Genealogist (1980). Association for the Promotion of Scholarship in Genealogy, (vol. 24 no. 1 p. 113). NY: Organization for the Promotion of Scholarship in Genealogy. FHL book 929.105 G286n;
Medieval, royalty, nobility family group sheets (1996), LDS. Family History Department. Medieval Family History Unit, (Manuscript. Salt Lake City : Filmed by the Genealogical Society of Utah, 1996). FHL film 1553977-1553985.
The New England Historical and Genealogical Register (1846). Boston: New England Historic Genealogical Society. FHL book 974 B2ne; CD-ROM No 33 Parts 1-9; See FHL catalog for microfilm numbers., (vol. 154, p. 222);
Paget, G. (1977). The Lineage and Ancestry of H. R. H. Prince Charles, Prince of Wales, (Vol.1, pp. 17). Baltimore: Geneal. Pub., FHL book Q 942 D22
Powick, F.M. (1953). The Thirteenth Century, 1216-1307. The Oxford History of England, 4, pp.268. Oxford: Clarendon Press. FHL book 942 H2oh.
Transactions of the Shropshire Archaeological and Natural history Society (1878-1921). Shropshire Archaeological and Natural History Society, 6(1), pp. 71. Shrewsbury: Adnitt and Nauton. FHL book 942.45 C4a.
Van Kerrebrouck, P. (2000). Les Capétiens, 987-1328, (pp.226). Villeneuve-d'Ascq, FR: N.p. FHL book 929.244 C171v.
Brydges, E.. Collins's Peerage of England, Genealogical, Biographical, and Historical, Greatly Augmented, and Continued to the Present Time. Vol. 1. London: T. Bensley, 1812. [ ] Page 222
William Flower. The visitations of the county of Nottingham in the years 1569 and 1614. Vol. 2. London: 1871. Internet Archive Page 124
Burke, J.B.. A Genealogical and Heraldic Dictionary of the Peerage and Baronetage, Together with Memoirs of the Privy Councillors and Knights. Vol 2. London: 1827-1878. [ ] Page 834
Burke, J.B. (1883). A Genealogical History of the Dormant, Abeyant, Forfeited, and Extinct Peerages of the British Empire, (pp.387). London: Harrison and Sons, 1962.
The Visitation of the County of Warwick in the Year 1619: Taken by William Camden, Clarenceaux. Vol. 12. Publications of the Harleian Society: Mitchell and Hughes, 1877. Open Library Page 283 Also: FHL: book 942 B4h, microfilm 162,048 item 2.
Ogle, Henry A.. Ogle and Bothal: Or, a History of the Baronies of Ogle, Bothal, and Hepple, and of the Families of Ogle and Bertram. Newcastle-upon-Tyne, ENG: A. Reid & Co., 1902. FamilySearch "Pedigree XIV."
ed. G.W. Marshall. The visitations of the county of Nottingham in the years 1569 and 1614. Vol. 4. London: Publications of the Harleian Society, 1871. Open Library Page 124. Also: FHL book 942 B4h. Microfilm 086,959 item 1
C. Wickliffe Throckmorton. A genealogical and historical account of the Throckmorton family in England and the United States. Richmond, VA: Old Dominion Press, 1930. Open Library Page 106. Also: FHL book 929.242 T416t; FHL microfilm 990,408 item 1
Watney, V.J.. The Wallop Family and Their Ancestry. Oxford: John Johnson, 1928. [ ] FHL book Q 929.242 W159w; FHL microfilm 1696491 items 6-9. Vol. 1 p. 22, 77, 193; Vol. 2 p. 319; Vol. 3 p. 573
It may be possible to confirm family relationships with Henry by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: