Arthur Wellesley, 5th Duke of Wellington married, in 1909, Hon. Lilian Maud Glen Coats, daughter of George Coats, 1st Baron Glentanar. They had two children: Arthur Wellesley, 5th Duke of Wellington Arthur Charles Wellesley, 5th Duke of Wellington, (9 June 1876 – 11 December 1941), known as Arthur Wellesley from 1876 to 1900, and as Marquess of Douro from 1900 to 1934, was a British nobleman and landowner. Wellesley was the son of Lord Arthur Charles Wellesley and his wife Kathleen Bulkeley Williams. His father inherited the title and vast Wellington estates on his older brother's death in 1900, and became the 4th Duke of Wellington.
Richard Wellesley, 6th Earl Cowley Richard Wellesley, 6th Earl Cowley Richard Francis Wellesley, 6th Earl Cowley (12 June 1946–13 December 1975), known as Viscount Dangan from 1962 to 1968, was a British Conservative politician. Cowley was the only son of Denis Arthur Wellesley, 5th Earl Cowley, and his first wife Elizabeth Anne (née Papillon), and was educated at Eton. He succeeded in the earldom on his father's early death in 1968 and took his seat on the Conservative benches in the House of Lords. He served briefly as a Lord-in-waiting (government whip in the House of Lords) under Edward Heath from January to March 1974.