Guilfoyle family name history and map
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Guilfoyle in 1911 Ireland
The 1911 Census recorded 702 people named Guilfoyle in Ireland; roughly one in every 6,300 people carried the name. The name was split fairly evenly between men and women: 357 men and 344 women. (A small number, 1, had no sex recorded.)
Counties with Guilfoyle in Ireland
Tipperary was Guilfoyle country: 25.1% of them (176 people) lived there in 1911. Next came Laois (139), Dublin (115), Kilkenny (50) and Clare (46).

Guilfoyle average age in 1911
The average Guilfoyle in 1911 was 30.1 years old, 29.8 for men and 30.4 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.
Guilfoyle literacy in 1911
Of the Guilfoyles whose literacy was recorded, 76.2% could both read and write, 5.3% could read but not write, and 18.6% 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.
Guilfoyle common first names
The most common male names were John (58), Patrick, Michael, Thomas and William. For women it was Mary (60), followed by Margaret, Bridget, Kate and Ellen.
Guilfoyle occupations in 1911
The most common entry on a Guilfoyle's census form was "Scholar"; 16.4% (115) were children at school. Among the rest, the most common occupations were farmer (13.2%), general labourer (6%), farm labourer (5.7%) and domestic servant (3.6%). Grouped by sector, agriculture accounted for 19.8% of all Guilfoyles, followed by general labourers, domestic service and retail & commerce.
What religion is Guilfoyle?
Guilfoyles were overwhelmingly Roman Catholic, 97.7% of them. The remainder were mostly Anglican (1.7%).

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Pete F
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Guilfoyle statistics (1911)
Number: 702
Rank: 1,030
Average Age: 30
Guilfoyle in the USA (2020)
Number: 1,695
Rank: 16,454
Note: If there were less than 100 in the USA census it will show as zero.