Birth Name: Timothy Blake Nelson
Place of Birth: Tulsa, Oklahoma
Date of Birth: May 11, 1964
Ethnicity: Ashkenazi Jewish
Tim Blake Nelson is an American actor, writer, and director. His mother, Ruth Kaiser Nelson, is a philanthropist, and his father, Don Nelson, is a geologist and wildcatter.
Tim’s father is of Russian Jewish descent. Tim’s maternal grandparents were German Jews.
Tim’s maternal grandparents were Herman George Kaiser (the son of Simon Kaiser and Fanny Wertheim) and Kate Samuel. Herman was born in Nardorf, Germany.
Sources: Genealogy of Tim Blake Nelson (focusing on his mother’s side) – http://www.geni.com
Obituary of Tim’s maternal grandfather, Herman George Kaiser – http://www.findagrave.com