Try the free search tool at: https://familysearch.org/
Once you get some details like the ones below, then you can plug in individuals, siblings, parents etc to find more details. Sometimes a child’s birth, marriage or death record can provide a missing maiden name of the mother etc. The census data, although not always accurate gives an approximate year and location of birth to start your searches with.
Exampler below:
U S Census, 1930 Rocky Station, Lee, VA
head John M Pugh M 20 VA/MO/VA
wife May Pugh F 21 OK/TN/TN
son John W Pugh M 0 VA
U S Census 1910 Civil District 6, Blount, TN
https://familysearch.org/pal:/MM9.1.1/MGNW-7TS
self John C Murphy M 36y TN
wife Eva Murphy F 35y TN
son Coy Murphy M 14y TN
son Ferman Murphy M 12y TN
son Bart Murphy M 10y TN
son Frank Murphy M 8y TN
son Earl Murphy M 7y OK
dau Maud Murphy F 5y OK
dau May Murphy F 3y OK
son Homer Murphy M 1y 5m TN
Virginia, Marriages
https://familysearch.org/pal:/MM9.1.1/XR3W-2N9
groom John M. Pugh
birth 1909 Lee Co., Va age: 17
father William Pugh mother Mary B.
marriage date: 02 Jan 1926
marriage place: Lee, Virginia
bride: Mae Murphy
birth 1905 Tennessee age: 21
father: J.P. Murphy
indexing project (batch) number: M01794-9
U S Census, 1920 Lee, Virginia
https://familysearch.org/pal:/MM9.1.1/MJJB-B4M
self William M Pugh M 54y MO
wife Mary B Pugh F 52y VA
dau Susie Pugh F 18y VA
son Sturat Pugh M 16y VA
son John M Pugh M 10y VA