guy david innes-ker, 10th duke of roxburghe (18 november 1954 – 29 august 2019), styled marquess of bowmont and cessford until 1974, was a british aristocrat. he was a liveryman of the worshipful company of fishmongers and a freeman of the city of london. he was the duke of roxburghe from 1974 until his death. he was also the premier baronet of scotland, and the 30th feudal baron of innes.