Iestyn

Iestyn is a masculine given name. Notable people with the name include:


 * Iestyn (saint), Welsh saint of the 6th or 7th centuries
 * Justinian of Ramsey Island, 6th-century hermit
 * Iestyn Davies, British opera singer
 * Iestyn ap Gwrgant (1045–1093), the last ruler of the Welsh kingdom of Morgannwg
 * Iestyn Edwards, stage and TV writer/performer, published poet and journalist
 * Iestyn Harris (born 1976), Welsh professional rugby league footballer
 * Iestyn Thomas (born 1976), Welsh rugby union footballer
 * Rhydderch ap Iestyn (died 1033), king of Gwent and Morgannwg in south Wales