From the Irish word clár, meaning "plank", after a bridge that was placed across the River Fergus outside Clarecastle.Clare is a county in the province of Munster in Ireland.
Possibly derives from Latin clarus, meaning "clear, bright", describing the clear nature of the Chilton Stream that flows through the town. The name first appears in the Domesday Book of 1086 as Clara.Clare is a market town in Suffolk, England.