On 22 December 1628 he was created Viscount Molyneux by King Charles I (taking his seat in the Irish House of Lords on 4 November 1634).
[2] In the same year, he was appointed Deputy Lieutenant of Lancashire but noted as a recusant and non communicant.
According to Gerald Aylmer, Molyneux was one of only two Royalist gentry in the county of Lancashire who held an important office of state during the period 1625–1642 [3] (?)
[4] Molyneux married Mary (1596 – before 21 June 1639), daughter of Sir Thomas Caryll of Bentons, Shipley, West Sussex, in about 1618.
[1][2] His widow remarried, to Raphael Tarterau, Carver to the Queen Consort (he survived her).