Colahan family name history and map
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Colahan in 1911 Ireland
The 1911 Census recorded 73 people named Colahan in Ireland; roughly one in every 60,000 people carried the name. There were noticeably more men than women recorded: 42 men to 30 women. (A small number, 1, had no sex recorded.)
Counties with Colahan in Ireland
The Colahans were heavily concentrated in Galway, home to 68.5% of them (50 people). Next came Antrim (6), Dublin (6), Limerick (4) and Kildare (3).

Colahan average age in 1911
The average Colahan in 1911 was 33.0 years old, 31.6 for men and 34.8 for women; slightly older than the national averages of 29.6 for men and 30.5 for women. That low figure reflects just how many children there were in Edwardian Ireland, along with high infant mortality and the limits of public health at the time. For comparison, average life expectancy in Ireland today is around 83.
Colahan literacy in 1911
Of the Colahans whose literacy was recorded, 82.9% could both read and write, 5.7% could read but not write, and 11.4% could do neither. Women came out slightly ahead, 86.7% reading and writing against 80% of men. Bear in mind these figures include young children; the census itself only counted people aged nine and over when calculating illiteracy, on the grounds that it was unfair to label a child illiterate before they'd had a chance to learn.
Colahan common first names
The most common male names were John (7), Patrick, Thomas, Michael and Martin. For women it was Mary (6), followed by Anne, Kate, Maggie and Amelia Isabella.
Colahan occupations in 1911
The most common entry on a Colahan's census form was "Scholar"; 24.7% (18) were children at school. Among the rest, the most common occupations were farmer (20.5%), carpenter / joiner (2.7%), clergy / religious (2.7%) and dressmaker / milliner (2.7%). Grouped by sector, agriculture accounted for 23.3% of all Colahans, followed by domestic service, professional and retail & commerce.
What religion is Colahan?
Colahans were overwhelmingly Roman Catholic, 98.6% of them.
Visitor Notes
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Added by
Pete F
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Colahan statistics (1911)
Number: 73
Rank: 4,636
Average Age: 33
Colahan in the USA (2020)
Number: 262
Rank: 78,629
Note: If there were less than 100 in the USA census it will show as zero.
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