Farrar
Northern English: occupational name for a smith or worker in iron, from Middle English and Old French farrour, ferour, from medieval Latin ferrator, an agent derivative of ferrare ‘to shoe horses’, from ferrum ‘iron’, in medieval Latin ‘horseshoe’. Compare Ferrier and Farrow.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
Ferrar
English: variant of Farrar.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
Ferrer
Catalan: occupational name for a blacksmith or a worker in iron, from Latin ferrarius. This is the commonest Catalan surname.
English: variant of Farrar.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4