Meaning A boy's name of Gaelic origin, it means "Rock." Origin of Ferghus Gaelic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Ferghus Similar Names Allen Fergie Fearghus Feargus Piaras Allan Allon Bealantin Gille Raibeart Year by Year Popularity of Ferghus