Knight of Kerry (Irish: Ridire Chiarraí[1]), also called The Green Knight, is one of three Hiberno-Norman hereditary knighthoods, all of which existed in Ireland since feudal times. The other two were The White Knight (surname fixed as Fitzgibbon), being dormant since the 19th century, and the Knight of Glin (The Black Knight), dormant since 2011. All three belong to the FitzMaurice/FitzGerald Dynasty commonly known as the Geraldines being created by the Earls of Desmond for their kinsmen.
Sir Maurice Buidhe FitzJohn, 1st Knight of Kerry, was the illegitimate son of John FitzGerald, 1st Baron Desmond (d. 1261 Battle of Callann), son of Thomas FitzMaurice, Lord OConnello, son of Maurice FitzGerald, Lord of Lanstephan, son of the Princess Nest ferch Rhys of Deheubarth and Gerald de Windsor.