Birth Name: Henry Jackson Thomas, Jr.
Place of Birth: San Antonio, Bexar, Texas, U.S.
Date of Birth: September 9, 1971
Ethnicity: English, German, Scottish, distant Dutch, likely Welsh
Henry Thomas is an American actor and musician. He is known for his roles in the film E.T.: The Extra-Terrestrial (1982), and for appearing in Mike Flanagan’s horror films and series.
He is the son of Carolyn and Henry Thomas, a hydraulic machinist. He has said that his family is from Wales.
Henry is married to Annalee Fery. He has a daughter with his former wife, German actress Marie Zielcke; and two children with Annalee.
Henry’s paternal grandfather was named George William Thomas.
Henry’s paternal grandmother was named Sadie Eulene Kendrick.
Henry’s maternal grandfather was Melvin Timothy Davis (the son of Thomas Jefferson Davis and Ella Lee Simpson). Melvin was born in Texas. Thomas was the son of William Henry Harrison Davis and Phoebe Lou Green. Ella was the daughter of Adolphus Lee Simpson and Nancy Matilda Sims.
Henry’s maternal grandmother was Mary Pauline Knop (the daughter of Ernest Otto Wilhelm Knop and Johnnie Davis). Mary was born in Texas. Ernest was born in Iowa, the son of German parents, Johann August Theodore Knop, from Prussia, and Pauline Wilhelmine Marx. Johnnie was the daughter of John Smith Davis and Mary Adeline Eldridge.
Source: Genealogy of Henry Thomas (focusing on his mother’s side) – http://heathcock.org