McMorran is a surname.Recorded as O'Morahan, O'Moran, McMorran, Moran, Morran, Morahan and others this is a very confusing surname. It is clearly of Irish origins, but as Moran, Morin, and Morain are also recorded in France, Ireland and England, the name could be from any of those countries. Notable people with the surname include:
References
McMorran Wikipedia(Text) CC BY-SA