Question: When was John Ponsonby, 4Th Earl Of Bessborough's father born?
Sentence (from "Frederick Ponsonby, 3rd Earl of Bessborough"): Frederick Ponsonby, 3rd Earl of Bessborough (24 January 1758 – 3 February 1844), styled the Viscount Duncannon from 1758–1793, was an Anglo-Irish peer.
Relevant evidence: Yes