Birth Name: Jacob Christopher Underwood
Place of Birth: El Cajon, San Diego, California, United States
Date of Birth: April 25, 1980
Ethnicity: English, Irish, German, remote Dutch, possibly other
Jacob is the son of Mechele and Steven Underwood. He is said to be a brother of actor Matthew Underwood.
Jacob’s maternal grandfather is Terrence Robert Caster (the son of Hubert Joseph “Bert” Caster and Mary Rita Dunn). Hubert was the son of Henry Caster and Laura Mae Reed. Mary was the daughter of John M. Dunn and Mary Fitzgerald, who were born in Wisconsin, both of them to Irish parents.
Jacob’s maternal grandmother is named Barbara Culver.
Sources: Genealogy of Jacob’s maternal grandfather, Terrence Robert Caster (through his own sister; focusing on his father’s side) – http://wc.rootsweb.ancestry.com
Genealogy of Jacob’s maternal great-grandfather, Hubert Joseph “Bert” Caster – http://www.ancestry.com
Genealogy of Jacob’s maternal great-grandmother, Mary Rita Dunn – http://www.ancestry.com
Jacob’s maternal great-grandmother, Mary Rita Dunn, on the 1910 U.S. Census – https://familysearch.org