I'm a MacGillivray myself and some people say that some of us were sheep thieves as a joke. My Daa told me that sheep and cattle theft was a serious offence in those days. My brother in Toronto told his co-workers that as a joke we were sheep thieves. They found themselves on a business trip somewhere and there was a portrait of people and one of them was holding a sheep in his arm. A coworker of my brother spotted it and cried MacGillivrays and they all started roaring with laughter.