What is "forbflaith"

Forbflaith (later Farbhlaidh, Forbhlaith, or Forlaith) is an Irish and Scottish Gaelic feminine given name meaning "an overlord, ruler, sovereign". It was recorded in this form in 8th-century Ireland.

The Anglicized form Ferelith has been in rare use since the late 19th century (a prominent bearer being Lady Anne Ferelith Fenella Bowes-Lyon (1917–80), later Princess Anne of Denmark, a niece of Queen Elizabeth The Queen Mother).