Hennessy family name history and map
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Hennessy in 1911 Ireland
The 1911 Census recorded 4,222 people named Hennessy in Ireland, about 0.096% of everyone living in the country at the time and the 202nd most common surname overall. The name was split fairly evenly between men and women: 2,122 men and 2,090 women. (A small number, 10, had no sex recorded.)
Counties with Hennessy in Ireland
Cork was Hennessy country: 28% of them (1,183 people) lived there in 1911. Next came Tipperary (486), Limerick (455), Dublin (358) and Kilkenny (333).
Hennessy average age in 1911
The average Hennessy in 1911 was 29.2 years old, 29.1 for men and 29.3 for women; almost exactly in line with 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.
Hennessy literacy in 1911
Of the Hennessys whose literacy was recorded, 77.5% could both read and write, 3.5% could read but not write, and 18.9% could do neither. Men came out slightly ahead, 79.1% reading and writing against 76% of 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.
Hennessy common first names
The most common male names were John (328), Patrick, Michael, James and Thomas; the same five names that topped the list nationally. For women it was Mary (406), followed by Margaret, Bridget, Ellen and Catherine.
Hennessy occupations in 1911
The most common entry on a Hennessy's census form was "Scholar"; 21.6% (911) were children at school. Among the rest, the most common occupations were farmer (13.3%), farm labourer (5.2%), general labourer (5.1%) and domestic servant (3.4%). Grouped by sector, agriculture accounted for 19% of all Hennessys, followed by domestic service, general labourers and retail & commerce.
What religion is Hennessy?
Hennessys were overwhelmingly Roman Catholic, 98.1% of them. The remainder were mostly Anglican (0.9%) and Presbyterian (0.1%).
Visitor Notes
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Added by
Pete F
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Hennessy statistics (1911)
Number: 4,222
Rank: 202
Average Age: 29
Hennessyin the USA (2020)
Number: 9,053
Rank: 3,821
Note: If there were less than 100 in the USA census it will show as zero.
