McKiernan family name history and map
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McKiernan in 1911 Ireland
The 1911 Census recorded 729 people named McKiernan in Ireland; roughly one in every 6,000 people carried the name. The name was split fairly evenly between men and women: 377 men and 352 women.
Counties with McKiernan in Ireland
Leitrim was McKiernan country: 42% of them (306 people) lived there in 1911. Next came Cavan (263), Dublin (33), Antrim (29) and Fermanagh (28).

McKiernan average age in 1911
The average McKiernan in 1911 was 32.9 years old, 32.4 for men and 33.5 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.
McKiernan literacy in 1911
Of the McKiernans whose literacy was recorded, 75% could both read and write, 5.4% could read but not write, and 19.6% could do neither. The figures were much the same for men and women. 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.
McKiernan common first names
The most common male names were John (50), Patrick, James, Thomas and Michael; the same five names that topped the list nationally. For women it was Mary (38), followed by Bridget, Maggie, Catherine and Mary Anne.
McKiernan occupations in 1911
The most common occupation among McKiernans was farmer, 29.5% of them (215 people). Next came scholar / student (16%), farm labourer (3.8%), general labourer (3.3%) and domestic servant (1.5%). Grouped by sector, agriculture accounted for 33.3% of all McKiernans, followed by general labourers, domestic service and textiles & clothing.
What religion is McKiernan?
McKiernans were overwhelmingly Roman Catholic, 95.9% of them. The remainder were mostly Anglican (3.3%) and Presbyterian (0.8%).

Visitor Notes
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Pete F
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McKiernan statistics (1911)
Number: 729
Rank: 1,001
Average Age: 33
McKiernan in the USA (2020)
Number: 2,225
Rank: 13,170
Note: If there were less than 100 in the USA census it will show as zero.