Mulloy family crest
The Irish surname Mulloy is of patronymic origin. The name is derived from the Gaelic name O Maolmhuaidh meaning " son of the proud chieftain ". The Mulloy's were part of the southern Ui Neill, the southern branch of the large tribal grouping claiming descent from Niall of the Nine Hostages, the fifth-century king of Ireland. 
 
                        

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