Wharton was the son of
"Honest Tom" Wharton, 1st Marquess of Wharton, the Whig partisan, and his second wife, Lucy Loftus, and had a good education. Well prepared for a life as a public speaker, the young Wharton was both eloquent and witty, but spoiled and prone to excess. When his father died in 1715, Philip, then sixteen years old, succeeded him as 2nd Marquess of Wharton and 2nd Marquess of Malmesbury in the
Peerage of Great Britain and as 2nd Marquess of Catherlough in the
Peerage of Ireland. Wharton did not get control of his father's extensive estate, as it had been put in the care of his mother and his father's
Whig friends until he reached the age of 21. In 1715, one month after inheriting these peerages, he
eloped with 15-year-old Martha Holmes, the daughter of Major-General Richard Holmes, who lacked any noble pedigree. Thereafter, young Wharton began to travel, leaving his wife behind in England. He travelled to France and
Switzerland chaperoned by a severe
Calvinist tutor whose authority he resented. He met
James Francis Edward Stuart, the "Old Pretender" and son of
King James II and VII, sometimes known in Europe as the rightful James III and VIII, or as James, Prince of Wales, who in 1716 created him
Duke of Northumberland in the
Jacobite peerage. Wharton then went to Ireland where, at the age of 18, he entered the
Irish House of Lords as Marquess of Catherlough. When he was 19 years old, in 1718, he was created
Duke of Wharton in the
Peerage of Great Britain by
King George I, part of an effort to solidify his support in the British
House of Lords. Upon returning to England from Ireland in 1718, he was reunited with Martha, now styled as the Duchess of Wharton. According to a letter written around this time by
Lady Mary Wortley Montagu to her sister Lady Mary, the young Duke was pompous and unfaithful, and used his wife to make his mistresses jealous: However, the following year, Thomas died in a
smallpox epidemic in London. Wharton blamed his wife, whom he had told to stay with the baby at their estate at
Winchendon, Buckinghamshire. According to author
Lewis Melville: made up of high-society
rakes celebrating debauchery, and primarily performed parodies of religious
rites, "which damned him in the eyes of all sober-minded persons." ==Political life==