Career
Katherine Cavendish.
Grosvenor was the commander of C Squadron, 1st Life Guards, and was killed in action, aged thirty, during World War I. Having no known grave, he is commemorated on the Menin Gate Memorial, Ypres. Children of Lord and Lady Hugh Grosvenor:
Gerald Hugh Grosvenor (1907–1967), later 4th Duke of Westminster
Robert George Grosvenor (1910–1979), later 5th Duke of Westminster
He was one of a number of British polo players who died in World War I.
