James Oliver Charles FitzRoy, Earl of Euston FCA (13 December 1947 – 1 October 2009) was the eldest child of the 11th Duke of Grafton and his wife Fortune.

He was educated at Eton and Magdalene College, Cambridge, graduating BA in 1973, later promoted to MA.

[2] On 16 September 1972, FitzRoy married Lady Clare Amabel Margaret Kerr, daughter of the 12th Marquess of Lothian and Antonella Kerr, Marchioness of Lothian.

His funeral took place at St Genevieve's Church, Euston, on 14 October.

He predeceased his father, and on the latter's death in 2011, the title of Duke of Grafton passed to Euston's only son Henry.