Question: When was John Ponsonby, 4Th Earl Of Bessborough's father born?
Sentence (from "John Ponsonby, 4th Earl of Bessborough"): John William Ponsonby, 4th Earl of Bessborough, PC (31 August 1781 – 16 May 1847), known as Viscount Duncannon from 1793 to 1844, was a British Whig politician.
Relevant evidence: Yes