Career
He was the third of four sons of William Molyneux, 4th Viscount Molyneux. lieutenant then passed to the second son, Caryll, who also died in 1745 leaving the title to William. He died on 30 March 1759 and the title passed to Thomas" son, Charles.
Other accounts state that the 7th viscount was Richard (born c1700) the son of Richard (5th viscount) and who was a Catholic priest in New England for a time as head of the Jesuits there and that the title then passed to William, also a Catholic priest.
However, Farrer and Brownbill"s A History of the County of Lancaster written in 1907 explains that the second Richard never existed and was a duplication of the earlier Richard in the ordinary pedigrees. lieutenant also clarifies that Caryll was the brother of Richard, William and Thomas.