Dennehy family name history and map
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Dennehy in 1911 Ireland
The 1911 Census recorded 1,332 people named Dennehy in Ireland, about 0.03% of everyone living in the country at the time and the 635th most common surname overall. The name was split fairly evenly between men and women: 693 men and 637 women. (A small number, 2, had no sex recorded.)
Counties with Dennehy in Ireland
The Dennehys were heavily concentrated in Cork, home to 69.1% of them (921 people). Next came Kerry (275), Waterford (34), Limerick (30) and Dublin (28).
Dennehy average age in 1911
The average Dennehy in 1911 was 29.8 years old, 28.8 for men and 31.0 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.
Dennehy literacy in 1911
Of the Dennehys whose literacy was recorded, 75.5% could both read and write, 4% could read but not write, and 20.5% 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.
Dennehy common first names
The most common male names were John (111), Patrick, Daniel, Michael and Denis. For women it was Mary (129), followed by Ellen, Margaret, Julia and Hannah.
Dennehy occupations in 1911
The most common entry on a Dennehy's census form was "Scholar"; 23.9% (319) were children at school. Among the rest, the most common occupations were farmer (11.9%), general labourer (6.1%), farm labourer (4.9%) and domestic servant (2.6%). Grouped by sector, agriculture accounted for 17.5% of all Dennehys, followed by general labourers, domestic service and textiles & clothing.
What religion is Dennehy?
Dennehys were overwhelmingly Roman Catholic, 99.6% of them. The remainder were mostly Anglican (0.1%).
Visitor Notes
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Added by
Pete F
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Dennehy statistics (1911)
Number: 1,332
Rank: 635
Average Age: 30
Dennehy in the USA (2020)
Number: 1,682
Rank: 16,566
Note: If there were less than 100 in the USA census it will show as zero.