Background
Molyneux was the son of Sir Richard Molyneux, 1st Baronet of Sefton and his wife Frances, the daughter of Sir Gilbert Gerard and Anne Ratcliffe.
Molyneux was the son of Sir Richard Molyneux, 1st Baronet of Sefton and his wife Frances, the daughter of Sir Gilbert Gerard and Anne Ratcliffe.
He was educated in Brazen Nose College, Oxford, he matriculated (entered) on 24 November 1609, aged 14, and was awarded his Bachelor of Arts on 1 July 1612.
He was admitted to Grays Inn on 2 February 1612. He was entered on the roll of the Preston Guild in 1602, 1622 and 1642. He returned to England and was knighted on 27 July 1639 by King Charles I at Berwick.
In 1640 he was a Lieutenant-Colonel in the English army commanded by Earl of Northumberland (during the Second Bishops" War with Scotland).
In the Civil War he suffered for the Royalist cause.