The story
- Irish · derived fromSíol Éalaigh
- Irish · borrowed fromsail éille“shillelagh”
- English todayshillelagh
From Irish sail éille (“shillelagh”, literally “cudgel of a thong”), altered to match the name of the village of Shillelagh (from Irish Síol Éalaigh (literally “descendants of Éalach”), because the forest near it provided wood from which such clubs could be made.
Etymology from Wiktionary, CC BY-SA 4.0.