Question: Who is the paternal grandfather of Sir William Monson, 4Th Baronet?
Answer: Sir John Monson, 2nd Baronet

1628 – 14 October 1674) was an English politician who sat in the House of Commons in two periods between 1660 and 1674. Monson was the son of Sir John Monson, 2nd Baronet of South Carlton and Broxbourne, Hertfordshire and his wife Ursula Oxenbridge, daughter of Sir Robert Oxenbridge of Hurstbourne Priors, Hampshire. He was a commissioner for militia for Lincolnshire in March 1660