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McGregor Family HistoryThis notable Scottish surname is an Anglicized form of the Old Gaelic "Mac Greigair". The Gaelic prefix "Mac" denotes "son of", and the personal name Griogan or Gregory comes from the ancient Greek (200 B.C.) "Gregorios", a derivative of "gregorian", to be awake or watchful. This name was borne by two 4th century fathers of the Orthodox Church, St. Gregory Nazianzene, and St. Gregory of Nyssa, but it was St. Gregory the Great, first Pope of the name, who spread its popularity in Western Europe.
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