[1] Born in Hammersmith, the eldest of the four sons of Archibald Montgomerie, 18th Earl of Eglinton, and his wife Marion Carolina Dunn-Yarker, Montgomerie was educated at Eton College and served as an officer of the Royal Navy from 1988 to 1993, after which he became a shipping operations manager.
[1] At the time of his father’s death, the family seat was at Balhomie House, near Cargill, Perthshire,[2] but this was sold in 2019.
The first of the name in Scotland was Robert of Montgomerie, who was granted the estate of Eaglesham in Renfrewshire in the reign of King David I (1124–1153).
His father had held the Castle of Sainte-Foy-de-Montgommery near Lisieux in Normandy and had come into England with William the Conqueror.
On 28 July 2001 he married secondly Carol Anne Robinson and with her has three children:[2] In 2020, after leaving Dell, Eglinton settled at Moffat in Dumfries and Galloway.