Moren is an Irish surname, which first originated from County Mayo, Ireland. The original Gaelic form of the name Moren is O Morain or O Moghrain, this is derived from the word "mor" which means "big." Notable people with the surname include:Lew Moren, baseball pitcher Peter Morén, member of Swedish band Peter Bjorn and John Peter Morén (drummer), heavy metal drummer Teri Moren, American basketball coach Valtteri Moren, Finnish footballer