Question: What nationality is Jehu Grubb's father?
Sentence (from "Jehu Grubb"): Jehu Grubb (a.k.a. John Grubb) (c. 1781 – 1854), unacknowledged son of the prominent ironmaster Curtis Grubb, was an early settler who became a leading citizen in Plain Township, Stark County, Ohio.
Relevant evidence: Yes