Background
De Montmorency was the son of Lodge Reymond de Montmorency, 2nd Viscount Frankfort de Montmorency, and Georgiana Frederica Henchy, daughter of Peter FitzGibbon Henchy Queen's Counsel.
De Montmorency was the son of Lodge Reymond de Montmorency, 2nd Viscount Frankfort de Montmorency, and Georgiana Frederica Henchy, daughter of Peter FitzGibbon Henchy Queen's Counsel.
He was educated at Eton.
He served in the British Army and became a major-general in 1889. He accompanied his regiment to India, and fought during the Indian Mutiny. He was aide-de-camp to Sir John Michel.
He volunteered with Sir Robert Napier, in the British Expedition to Abyssinia.
He commanded in the Sudan in 1886-1887. In December 1889, he also succeeded his father in the viscountcy.
This was an Irish peerage and did not entitle him to an automatic seat in the House of Lords. However, in 1900 he was elected an Irish Representative Peer, replacing the deceased Lord Inchiquin, and was able to take his seat in the upper chamber of parliament.
In 1898, he had been made a Knight Commander of the Order of the Bath.
Their eldest son, the Honourable Raymond de Montmorency was killed in action at the Battle of Stormberg in 1900.