He was the son of Lieutenant-Colonel Edward Marten Dunne (1864–1944), Liberal Member of Parliament (MP) for Walsall (1906–1910), of Gatley Park, Leominster, Herefordshire, by his wife Hon.
He was the progeny of Lieutenant-Colonel Edward Marten Dunne (1864–1944), a Liberal politician who served as MP for Walsall from 1906 to 1910, and resided at Gatley Park in Leominster, Herefordshire, with his wife Hon.