The Ferrell surname comes from the Irish Gaelic name O Fearghail, which means "a valiant warrior." Early Origins of the Ferrell family The surname Ferrell was first found in Leinster, where they were found mainly in County Longford. Feargal, Prince of Annaly appears number 105 on the "Line of Ir" descendants.

Ferrell is an Irish name derived from the Irish Gaelic "O Fearghail," which has uncertain meaning but is most typically taken to mean "man of valor." Currently, the earliest Ferrell family history known has them starting in Leinster, Ireland. In America, Ferrell can have many different spellings, such as Ferrel, Ferrill, and Frawley.