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The O'CALLAGHAN surname in the USA

Frequency Comparisons
Total Rank Frequency % Per million people
United States
United States (Current snapshot) 2,779 10588 0.001 10
United States (1880 census) 85 35067 0 2
Change since 1880 +2694 +24479 +N/A +8
Other Countries
Australia 20 51633 0 1
United Kingdom 369 11058 0.001 8
Top States for O'CALLAGHAN by Total
State Total Rank in State Frequency % Per million people
California 328 7540 0.001 10
New York 303 5860 0.002 16
Massachusetts 293 2734 0.005 46
Florida 191 8949 0.001 12
Illinois 165 7192 0.001 13
Top States for O'CALLAGHAN by Frequency
State Total Rank in State Frequency % Per million people
Massachusetts 293 2734 0.005 46
New Hampshire 35 4417 0.003 28
Connecticut 80 5228 0.002 23
Nebraska 32 7914 0.002 19
New Jersey 140 6346 0.002 17

Notes

'A figure of zero indicates that we don't have data for this name (usually because it's quite uncommon and our stats don't go down that far). It doesn't mean that there's no-one with that name at all!

For less common surnames, the figures get progressively less reliable the fewer holders of that name there are. This data is aggregated from several public lists, and some stats are interpolated from known values. The margin of error is well over 100% at the rarest end of the table!

For less common surnames, the frequency and "per million" values may be 0 even though there are people with that name. That's because they represent less than one in a million of the population, which ends up as 0 after rounding.

It's possible for a surname to gain in rank and/or total while being less common per million people (or vice versa) as there are now more surnames in the USA as a result of immigration. In mathematical terms, the tail has got longer, with a far larger number of less common surnames.

Figures for top states show firstly the states where most people called O'CALLAGHAN live. This obviously tends to be biased towards the most populous states. The second set of figures show where people called O'CALLAGHAN represent the biggest proportion of the population. So, in this case, there are more people called O'CALLAGHAN in California than any other state, but you are more likely to find a O'CALLAGHAN by picking someone at random in Massachusetts than anywhere else.

Classification and Origin of O'CALLAGHAN

Region of origin: British Isles

Country of origin: Ireland

Language of origin: Gaelic

Ethnic origin: Celtic

Religious origin: Christian

Name derivation: From name of parent

Data for religion and/or language relates to the culture in which the O'CALLAGHAN surname originated. It does not necessarily have any correlation with the language spoken, or religion practised, by the majority of current American citizens with that name.

Data for ethnic origin relates to the region and country in which the O'CALLAGHAN surname originated. It does not necessarily have any correlation with the ethnicity of the majority of current American citizens with that name.

Ethnic distribution of O'CALLAGHAN in the USA

Classification Total Percent
Mixed Race 34 1.22
White (Hispanic) 31 1.12
Asian/Pacific 19 0.68
Black/African American 6 0.22
White (Caucasian) 2,689 96.76
Native American/Alaskan Less than 100 0

Ethnic distribution data shows the number and percentage of people with the O'CALLAGHAN surname who reported their ethnic background as being in these broad categories in the most recent national census.

Meaning of O'CALLAGHAN in historical publications

Sorry, we don't have any information on the meaning of O'CALLAGHAN.

Similar names to O'CALLAGHAN

The following names have similar spellings or pronunciations as O'CALLAGHAN.

This does not necessarily imply a direct relationship between the names, but may indicate names that could be mistaken for this one when written down or misheard.

Matches are generated automatically by a combination of Soundex, Metaphone and Levenshtein matching.

Potential typos for O'CALLAGHAN

The following words are slight variants of O'CALLAGHAN that are likely to be possible typos or misspellings in written material.