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Surnames by county · Leinster

Most common surnames in County Longford

O'Reilly was the commonest surname in Co. Longford in 1911: 1,569 people, about one resident in 28. It was followed by Farrell, Kiernan, Brady and Kelly.

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 O'Reilly 1,569 358 1 1
2 Farrell 1,460 333 2 2
3 Kiernan 743 170 3 3
4 Brady 657 150 4 5
5 Kelly 644 147 5 4
6 Kenny 523 119 6 6
7 McCormack 478 109 8 7
8 Smith 452 103 7 8
9 Murphy 414 95 9 9
10 Quinn 414 95 10 11
11 Mulligan 359 82 11 10
12 O'Donoghue 349 80 12 12
13 Casey 333 76 14 13
14 Duffy 316 72 13 15
15 Maguire 311 71 15 14
16 Reynolds 293 67 16 17
17 Clarke 266 61 19 20
18 Hughes 266 61 17 21
19 Dolan 259 59 21 23
20 O'Connor 257 59 20 16
21 Lynch 238 54 26 26
22 Masterson 235 54 25 25
23 Murtagh 233 53 18 27
24 Sheridan 230 53 24 19
25 Doyle 227 52 23 24

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 Longford

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

  1. Farrell 11.06× 1,460 people · 333 per 10,000
  2. O'Reilly 6.44× 1,569 people · 358 per 10,000
  3. Brady 6.12× 657 people · 150 per 10,000
  4. Kenny 5.64× 523 people · 119 per 10,000
  5. McCormack 4.83× 478 people · 109 per 10,000
  6. Casey 3.62× 333 people · 76 per 10,000
  7. O'Donoghue 3.02× 349 people · 80 per 10,000
  8. Quinn 2.6× 414 people · 95 per 10,000
  9. Duffy 2.6× 316 people · 72 per 10,000
  10. McKenna 2.48× 212 people · 48 per 10,000

Questions about surnames in Longford

What is the most common surname in County Longford?

In the 1911 census the most common surname in Co. Longford was O'Reilly, with 1,569 people, or about one resident in 28. The next most common were Farrell, Kiernan, Brady and Kelly. O'Reilly was still the commonest name in 1926.

Which surnames are most typical of County Longford?

Compared with Ireland as a whole, the names most over-represented in Co. Longford in 1911 (among the 100 commonest Irish surnames) were Farrell (11.06× the national rate), O'Reilly (6.44× the national rate), Brady (6.12× the national rate).

Ancestors from County Longford?

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

Longford records on irishcensus.com