Sir John Leslie, 2nd Baronet

Colonel Sir John Leslie, 2nd Baronet, (7 August 1857 – 25 January 1944) was a British Army officer and landowner. He was the only son of Sir John Leslie, 1st Baronet, and Lady Constance Wilhelmina Frances Dawson-Damer, sister of the 4th Earl of Portarlington. His father was the Conservative Member of Parliament for Monaghan from 1871 to 1880 and was created a baronet in 1876. After his father's death in January 1916, Leslie succeeded his father as the 2nd Baronet Leslie, of Glaslough. He was educated at Eton. and later became honorary colonel of the battalion. In 1915, he was appointed lieutenant-colonel of the 12th Reserve Battalion, Royal Inniskilling Fusiliers. The Leslies were strongly opposed to the Home Rule movement. Leslie led the Monaghan Militia in the 1890s and he allowed the Ulster Volunteers to drill at his demesne in 1914. Leonie's sister was Jennie, wife of Lord Randolph Churchill and mother of Winston Churchill. who married Marjorie Ide, daughter of Henry Clay Ide, the American Governor-General of the Philippines. Lionel Alistair David Leslie (1900–1987), who married Barbara Yvonne Enever in 1942.

The Leslie family were one of the largest landowning families in Ulster. Their holdings comprised in counties Monaghan, Fermanagh, Tyrone and Donegal. In his second autobiographical book, Lionel recounted various anecdotes about his immediate family and their home at Castle Leslie in County Monaghan.

Sir John Leslie died in Glaslough, County Monaghan in Ireland on 25 January 1944.

Descendants Through his eldest son, and Desmond Arthur Leslie (1921–2001), a pilot and film maker.