McMahon

---

Maps

• McMahon in 1659.

---

• McMahon births mapped 1864-1913
  

  ---

• McMahon 1901 census map
  

  ---

• McMahon 1911 census map
  

  ---

• McMahon Roman Catholic baptisms new!
  

  ---

  The surname

  ---

  

  ---

• Family histories: 5

  ---

• Full surname history

  ---

• Websites

  McMahon
  Ontario
  
  McMahon
  
  
  McMahon
  Cavan (archived)
  
  McMahon
  Monaghan
  
  

  ---

---

Parishes where McMahon and a second surname are found together

Surname:

---

Household numbers by county in Griffith's (1847-64), as on the map

Click on a county to see more detail

Antrim:	5	Armagh:	85	Belfast city:	31	Carlow:	1
Cavan:	116	Clare:	799	Cork:	23	Cork city:	5
Derry:	8	Donegal:	7	Down:	76	Dublin:	49
Dublin city:	31	Fermanagh:	134	Galway:	13	Kerry:	69
Kildare:	10	Kilkenny:	6	Laois:	33	Leitrim:	2
Limerick:	212	Limerick city:	61	Longford:	3	Louth:	45
Mayo:	5	Meath:	43	Monaghan:	436	Offaly:	6
Roscommon:	4	Tipperary:	40	Tyrone:	103	Waterford:	5
Westmeath:	3	Wexford:	4	Wicklow:	5

Surname Dictionary

Mac Mathghamhna	Mac Mahon: an-líonmhar: an Clár-Luimneach-Tiobraid Árann- Ciarraí agus Muineachán. Freagraíonn an dáileadh sa leis an dá chlann stairiúla: (1) an dream i dTuathmhumhain a bhí suite i gCorca Bascinn agus a shíolraigh ó Mhathúin, gar-mhac le Brian Bóroimhe; (2) clann Oirghialla a bhí cumhachtach sa dúiche sin agus gur cuireadh a dtaoiseach deireannach chun báis i Londain i 1644. Chuaidh cuid acu ar an Mór-Roinn tar éis treascairt an 17 céad agus díobh san do b'ea Patrick Mac Mahon (1808-1893), Uachtarán na Fraince agus saighdiúir céimiúil. Brí: féach Ó Mathúna. IF.
MacMahon	Very numerous: Clare-Limerick-Tipperary-Kerry and Monaghan-Cavan-Louth. Ir. Mac Mathghamhna, "bear-calf". Mod. Mac Mathúna. Two septs: one of Thomond (Clare) and related to the O'Briens; the other of Oriel (Monaghan). SGG, IF, GPN.
Mahon	Very numerous: South East, Midlands, Ulster, Connacht. Ir. Ó Macháin (Ulster); Ó Mócháin (Connacht). This latter seems to give rise to most Mahons in the South.MIF.

---

Variants in Griffith's
& total households

Click here to see all variants on a single map

Click on a name to see it on the map.

Mahan: 20
Mahon: 998
McMahon: 2478

Non-Griffith's Variants

Click here for all variant sources.

Click on a name below for just its sources.

M'Mahon
Mac Mahuna
Mac Mathghamhna
Machon
MackMahan
MackMahon
Macmaghan
MacMahon
MacMathuna
Maghen
Maghon
Mahaan
Mahen
Mahhon
Mahin
Mahone
Mahoon
Mahoone
Mc Mahon
Mccmahon
McMachon
McMaghan
McMaghon
McMaghone
McMahan
McMahen
McMahn
McMahone
Mcmahun
McMaughon
Mehon
Mkmaughan