In 1361 King Edward III of England (age 48) created three of his sons as Garter Knights ...

35th Lionel Plantagenet 1st Duke of Clarence (age 22).

36th John of Gaunt 1st Duke Lancaster (age 20).

37th Edmund of Langley 1st Duke of York (age 19).

38th Edward Despencer 1st Baron Despencer, Baron Burghesh (age 25).