Background
Molyneux was the eldest son of William Molyneux, 4th Earl of Sefton (1835–1897) by his wife Honorary Cecil Emily Hylton-Jolliffe, daughter of the 1st Baron Hylton.
Molyneux was the eldest son of William Molyneux, 4th Earl of Sefton (1835–1897) by his wife Honorary Cecil Emily Hylton-Jolliffe, daughter of the 1st Baron Hylton.
He was known as "Mull" within the family. He held a commission in the Lancashire Hussars Yeomanry Cavalry, and was Aide-de-Camp to the Lord Lieutenant of Ireland 1889-1892. Lord Sefton never married.
Shortly before succeeding to his titles, as a fit young man of 30 he suffered a bad fall in the Altcar Steeplechase in 1897 which left him severely brain damaged, a hopeless invalid and mentally unstable.
His engagement to Mary Heathcote-Drummond-Willoughby, daughter of the 1st Earl of Ancaster was called off and he eventually died from his injuries. He died at his family seat, Croxteth Hall, near Liverpool, 2 December 1901, aged only 34, and was buried nearby in Street Chad"s churchyard, Kirkby.
