[5] Yale's brother, Lt. Gen. Sir Love Jones-Parry, was an Oxford graduate and member of Parliament, who served during the War of 1812 against America.
Thomas Parry Jones-Parry, became Deputy Lieutenant and High Sheriff of Caernarvonshire, while his sister-in-law, Margaret, was the daughter of Vice-Admiral Robert Lloyd.
[7] Other brothers-in-law included Lt. Col. Robert Browne Macgregor, of the 88th Regiment of Foot during the Napoleonic Wars, and Major-General William Clapham of Widcombe Manor.
[7] Yale's uncle was Col. Gwyllym Lloyd Wardle, member of Parliament and opponent of Prince Frederick, Duke of York.
[9][1] Yale then engaged at the Battle of Bussaco, along with the Portuguese army, facing Marshal André Masséna, Prince of Essling.
[12][13][2] He served under Lord Lieutenant Robert Myddelton Biddulph, proprietor of Chirk Castle and aide-de-camp to Queen Victoria.