MacMahon family crest
The Irish surname MacMahon is an anglicized form of Gaelic Mac Mathghamhna, a patronymic from the byname Mathghamhain meaning “good calf.” This was the name of two (unrelated) chieftain families in counties Clare and Monaghan. The most outstanding MacMahon was Edmond Patrice, Compte de MacMahon (1808 - 1893), Marshal of France, and President of the Third Republic for six years. The family Coat of Arms is a silver shield with three red lions passant reguardant in pale, armed and langued azure. Today there are approximately 600 people with the family name MacMahon living in The United States. The more common variant McMahon has 39,000 bearers.

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