Question: What is the date of birth of Guildford Onslow's father?
Sentence (from "Guildford Onslow"): Guildford Onslow was the second of five sons of Colonel Thomas Cranley Onslow whose father in turn was a wealthy late 18th century British Royal family friend and politician, Thomas Onslow, 2nd Earl of Onslow.
Relevant evidence: Yes