Finbar \f(i)-nbar, fin-bar\ as a boy's name is of Irish and Gaelic origin, and the meaning of Finbar is "white or fair head". Anglicized form of the Gaelic name Fionnbharr. A prominent abbott and bishop who kept the Catholic Church alive in Ireland during the seventh and eighth centuries. One tale tells of Saint Finbar crossing the Irish Sea on horseback. The pet form is Bairre (see Barry), and the Isle of Barra in the Hebrides is said to be named after him.