Sir James Roualeyn Hovell-Thurlow-Cumming-Bruce, PC (9 March 1912 – 12 June 2000) was a British barrister and judge who was a Lord Justice of Appeal from 1977 to 1985.
Roualeyn Cumming-Bruce was the third son of the Charles Edward Hovell-Thurlow-Cumming-Bruce, 6th Baron Thurlow, and the younger of identical twin boys.
In the Second World War, he served in the Royal Artillery in North Africa and the Middle East, becoming a lieutenant colonel.
Despite a conviction for drunk driving 18 months earlier, he was promoted to the Court of Appeal (as Lord Justice Cumming-Bruce) and joined the Privy Council in 1977.
One of his early appeal cases was Miller v. Jackson, in which he joined Lord Denning in ruling that a cricket club could continue to play matches on a village green, even though balls were occasionally hit onto neighbouring properties.