MAC DARA: Irish Gaelic name meaning "son of oak." This is the name of a patron saint and is still common in Ireland, especially in Connemara.
MAEDÓC: Old Irish name meaning "my dear Áedh."
MAELEACHLAINN: Variant spelling of Irish Gaelic Maolseachlainn, meaning "devotee of Seachlainn."
MAEL-MAEDÓC: Old Irish Gaelic name meaning "devotee of Maedóc."
MAGNUS: Scandinavian name derived from the latter part of French Charlemagne ("Charles the Great"), from Latin magnus, meaning "great." Used infrequently by the Irish and Scottish. Compare with another form of Magnus.
MAINCHÍN: Irish Gaelic name composed of the word manach "monk" and a diminutive suffix, hence "little monk."
MÁIRTÍN: Irish Gaelic form of English/French Martin, meaning "of/like Mars."
MALONE: Irish surname transferred to forename use, from an Anglicized form of Gaelic Ó Maoil Eoin, meaning "devotee of St. Eoin (John)."
MANUS: Irish form of Roman Latin Magnus, meaning "great."
MAODHÓG: Modern form of Old Irish Gaelic Maedóc, "my dear Áedh."
MAOILEACHLAINN: Variant spelling of Irish Gaelic Maeleachlainn, meaning "devotee of Seachlainn."
MAOILMHÍN: Old Irish Gaelic name meaning "gentle chieftain."
MAOLGFHOGHMHAIR: Old Irish Gaelic name meaning "chief of harvest."
MAOLSEACHLAINN: Irish name composed of the Gaelic word mael "devotee" and the personal name Seachlainn, hence "devotee of Seachlainn."
MARCAS: Irish Gaelic form of Latin Marcus, meaning "defense" or "of the sea."
MÁRTAN: Irish Gaelic form of Latin Martinus, meaning "of/like Mars."
MATHGHAMHAIN: Irish Gaelic byname meaning "bear calf."
MATHÚIN: Modern Irish spelling of the Old Gaelic byname Mathghamhain, meaning "bear calf."
MEALLÁN: Irish Gaelic name which was probably originally a byname for a short stocky person, composed of the elements meall "knot, lump" and a diminutive suffix, hence "little lump."
MELLAN: Variant spelling of Irish Meallán, meaning "little lump."
MÍCHEÁL: Irish Gaelic form of Greek Michaēl, meaning "who is like God?"
MIDIR: Irish name of unknown meaning. In Celtic mythology, this is the name of a lord of the underworld, the husband of Fuamnach.
MIL: Irish legend name (Mil Espane "Mil of Spain") of the father of Éibhear Dunn and Éibhear Finn, who conquered Ireland. Possibly derived from the Latin word miles, meaning "soldier."
MILE: Variant spelling of Irish Mil, possibly meaning "soldier." Compare with another form of Mile.
MOLAN: Irish name meaning "servant of the storm."
MUIRIS: Irish form of Roman Latin Maurice, meaning "dark-skinned; Moor."
MUNRO: Irish surname transferred to forename use, derived from Monadh Roe or Mont Roe, meaning "from the mount on the river Roe." This is the name from which Scottish Monroe was derived.
MUNROE: Variant spelling of Irish Munro, meaning "from the mount on the river Roe."
MURPHY: Irish surname transferred to forename use, from an Anglicized form of Gaelic Ó Murchadha "descendant of Murchadh," hence "sea-warrior."
MURTAGH: Irish form of Scottish Gaelic Muireadhach, meaning "sea warrior." Compare with another form of Murtagh.
MAEDÓC: Old Irish name meaning "my dear Áedh."
MAELEACHLAINN: Variant spelling of Irish Gaelic Maolseachlainn, meaning "devotee of Seachlainn."
MAEL-MAEDÓC: Old Irish Gaelic name meaning "devotee of Maedóc."
MAGNUS: Scandinavian name derived from the latter part of French Charlemagne ("Charles the Great"), from Latin magnus, meaning "great." Used infrequently by the Irish and Scottish. Compare with another form of Magnus.
MAINCHÍN: Irish Gaelic name composed of the word manach "monk" and a diminutive suffix, hence "little monk."
MÁIRTÍN: Irish Gaelic form of English/French Martin, meaning "of/like Mars."
MALONE: Irish surname transferred to forename use, from an Anglicized form of Gaelic Ó Maoil Eoin, meaning "devotee of St. Eoin (John)."
MANUS: Irish form of Roman Latin Magnus, meaning "great."
MAODHÓG: Modern form of Old Irish Gaelic Maedóc, "my dear Áedh."
MAOILEACHLAINN: Variant spelling of Irish Gaelic Maeleachlainn, meaning "devotee of Seachlainn."
MAOILMHÍN: Old Irish Gaelic name meaning "gentle chieftain."
MAOLGFHOGHMHAIR: Old Irish Gaelic name meaning "chief of harvest."
MAOLSEACHLAINN: Irish name composed of the Gaelic word mael "devotee" and the personal name Seachlainn, hence "devotee of Seachlainn."
MARCAS: Irish Gaelic form of Latin Marcus, meaning "defense" or "of the sea."
MÁRTAN: Irish Gaelic form of Latin Martinus, meaning "of/like Mars."
MATHGHAMHAIN: Irish Gaelic byname meaning "bear calf."
MATHÚIN: Modern Irish spelling of the Old Gaelic byname Mathghamhain, meaning "bear calf."
MEALLÁN: Irish Gaelic name which was probably originally a byname for a short stocky person, composed of the elements meall "knot, lump" and a diminutive suffix, hence "little lump."
MELLAN: Variant spelling of Irish Meallán, meaning "little lump."
MÍCHEÁL: Irish Gaelic form of Greek Michaēl, meaning "who is like God?"
MIDIR: Irish name of unknown meaning. In Celtic mythology, this is the name of a lord of the underworld, the husband of Fuamnach.
MIL: Irish legend name (Mil Espane "Mil of Spain") of the father of Éibhear Dunn and Éibhear Finn, who conquered Ireland. Possibly derived from the Latin word miles, meaning "soldier."
MILE: Variant spelling of Irish Mil, possibly meaning "soldier." Compare with another form of Mile.
MOLAN: Irish name meaning "servant of the storm."
MUIRIS: Irish form of Roman Latin Maurice, meaning "dark-skinned; Moor."
MUNRO: Irish surname transferred to forename use, derived from Monadh Roe or Mont Roe, meaning "from the mount on the river Roe." This is the name from which Scottish Monroe was derived.
MUNROE: Variant spelling of Irish Munro, meaning "from the mount on the river Roe."
MURPHY: Irish surname transferred to forename use, from an Anglicized form of Gaelic Ó Murchadha "descendant of Murchadh," hence "sea-warrior."
MURTAGH: Irish form of Scottish Gaelic Muireadhach, meaning "sea warrior." Compare with another form of Murtagh.