Family name origins & meanings
- Irish (Roscommon and Longford) : variant of (Mac)Kilcline, an Anglicization of Gaelic Mac Giolla Chlaoin ’son of the deceitful lad’, from claon ‘deceitful’.
- Scottish : habitational name from any of various places named Clyne, from Gaelic claon ‘slope’.
- Americanized spelling of German and Jewish Klein.