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Surnames by county · Ulster

Most common surnames in County Monaghan

McKenna was the commonest surname in Co. Monaghan in 1911: 1,929 people, about one resident in 37. It was followed by Duffy, Connolly, McMahon and Smith.

Counts are people living in the county on census night, with spelling variants combined (Sullivan and O'Sullivan count as one name).

Donegal Waterford Dublin Kilkenny Carlow Limerick Louth Tipperary Roscommon Meath Wicklow Cavan Cork Clare Galway Mayo Sligo Leitrim Offaly Laois Kildare Kerry Monaghan Wexford Longford Westmeath Tyrone Antrim Armagh Fermanagh Londonderry Down

The 25 commonest names, 1911

#SurnamePeoplePer 10,00019011926
1 McKenna 1,929 270 1 1
2 Duffy 1,503 210 2 2
3 Connolly 1,203 168 3 3
4 McMahon 1,003 140 4 4
5 Smith 971 136 6 5
6 McCabe 927 130 5 6
7 Murphy 784 110 7 7
8 Kelly 708 99 9 8
9 Hughes 707 99 8 9
10 Treanor 551 77 15 10
11 Keenan 548 77 12 14
12 Martin 526 74 10 11
13 Maguire 511 71 13 13
14 McNally 473 66 16 12
15 Woods 459 64 18 20
16 Ward 431 60 11 16
17 Daly 412 58 23 21
18 McArdle 386 54 17 23
19 Clarke 380 53 24 25
20 Brennan 378 53 20 17
21 O'Reilly 372 52 22 15
22 Murray 367 51 19 18
23 Brady 359 50 27 26
24 Marron 359 50 14 19
25 Callan 334 47 21 27

The 1901 and 1926 columns give the name's rank in the county in that year; a dash means it was outside the top 40. Linked names have a full page with meaning, Irish forms and history.

Names most typical of Monaghan

Among the 100 commonest Irish surnames, these were the most over-represented in Co. Monaghan in 1911, compared with their share of Ireland's population as a whole.

  1. McKenna 13.81× 1,929 people · 270 per 10,000
  2. Duffy 7.59× 1,503 people · 210 per 10,000
  3. McMahon 6.43× 1,003 people · 140 per 10,000
  4. Connolly 5.21× 1,203 people · 168 per 10,000
  5. Hughes 3.72× 707 people · 99 per 10,000
  6. Ward 2.81× 431 people · 60 per 10,000
  7. Maguire 2.46× 511 people · 71 per 10,000
  8. Martin 2.39× 526 people · 74 per 10,000
  9. Graham 2.06× 293 people · 41 per 10,000
  10. Brady 2.05× 359 people · 50 per 10,000

Questions about surnames in Monaghan

What is the most common surname in County Monaghan?

In the 1911 census the most common surname in Co. Monaghan was McKenna, with 1,929 people, or about one resident in 37. The next most common were Duffy, Connolly, McMahon and Smith. McKenna was still the commonest name in 1926.

Which surnames are most typical of County Monaghan?

Compared with Ireland as a whole, the names most over-represented in Co. Monaghan in 1911 (among the 100 commonest Irish surnames) were McKenna (13.81× the national rate), Duffy (7.59× the national rate), McMahon (6.43× the national rate).

Ancestors from County Monaghan?

Browse every townland and household in Co. Monaghan in the 1901, 1911 and 1926 censuses.

Monaghan records on irishcensus.com