Flaherty

The story

1. Proto-Celtic · derived from*berxtos“bright, shining”
2. Irish · derived fromFlaithbheartach
3. English todayFlaherty

From Irish Flaithbheartach, Flaithbheartaigh (“bright ruler”), from flaith (“prince, ruler”) + Proto-Celtic *berxtos (“bright, shining”), cognate with Proto-Germanic *berhtaz (“bright, shining”).