Greenan

The story

1. Irish · derived fromgrianán“person of sunny disposition”
2. Irish · derived fromÓ Grianáin“descendant of Grianán”
3. English todayGreenan

Reduced Anglicized form of Irish Ó Grianáin (“descendant of Grianán”), a personal name derived from Irish grianán (“person of sunny disposition”), a diminutive form of grian (“sun”).