Roxburghe was born in 1981 at
Eastern General Hospital in
Leith,
Edinburgh, the eldest son of the
10th Duke of Roxburghe and his first wife, the former
Lady Jane Meriel Grosvenor, daughter of the
5th Duke of Westminster. He was christened at St Andrew's Church,
Kelso. His godparents included Sir
William van Straubenzee, his great-uncle Lord Robert Innes-Kerr,
Annabel, Viscountess Astor and
Lady Iona Grimston. His uncle was
Gerald Grosvenor, 6th Duke of Westminster. He chose to pay a £10 fine rather than take the case to court and risk appearing on "losers' posters" displayed around the city, naming people who had been caught travelling without tickets. Prior to succeeding to the dukedom on his father's death in August 2019, he was styled Marquess of Bowmont and Cessford. As Lord Bowmont and with his fellow officer Rob Bassett-Cross he set up a company called Capstar, which owned a fleet of black
Jaguar XJs and provided chauffeur services, employing mostly ex-servicemen and women. Upon his accession to the dukedom in 2019, he inherited
Floors Castle and 60,000 acres around the
Cheviot Hills and the
River Tweed as well as
hotels in the area, with an estimated wealth of up to £100 million. ==Marriages and children==