The Irish surname McMahon 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 McMahon /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 39,000 people with the family name MacMahon living in The United States. 
MCMAHON EMPEROR CREST RING
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MCMAHON DUKE CREST RING . 
MCMAHON DUKE CREST RING . MCMAHON BLUE CREST RING CUSTOM
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MCMAHON MONARCH CREST PENDANT
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MCCMAHON DUKE CREST PENDANT
MCCMAHON DUKE CREST PENDANT
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