Denniston family name history and map
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Denniston in 1911 Ireland
The 1911 Census recorded 57 people named Denniston in Ireland; roughly one in every 77,000 people carried the name. There were noticeably more men than women recorded: 33 men to 24 women.
Counties with Denniston in Ireland
Longford was Denniston country: 45.6% of them (26 people) lived there in 1911. Next came Donegal (11), Armagh (6), Mayo (5) and Tyrone (5).

Denniston average age in 1911
The average Denniston in 1911 was 33.7 years old, 34.0 for men and 33.3 for women; noticeably 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.
Denniston literacy in 1911
Of the Dennistons whose literacy was recorded, 88.9% could both read and write, 5.6% could read but not write, and 5.6% could do neither. Men came out slightly ahead, 93.3% reading and writing against 83.3% 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.
Denniston common first names
The most common male names were John (5), Samuel, Thomas, William and Alexander. For women it was Anne (2), followed by Ellen, Lizzie, Maria and Mary.
Denniston occupations in 1911
The most common occupation among Dennistons was farmer, 36.8% of them (21 people). Next came scholar / student (8.8%), general labourer (7%), textile worker (5.3%) and farm labourer (3.5%). Grouped by sector, agriculture accounted for 40.4% of all Dennistons, followed by general labourers, textiles & clothing and domestic service.
What religion is Denniston?
The largest religious group among Dennistons was Anglican, at 40.4%. The remainder were mostly Presbyterian (29.8%), Roman Catholic (24.6%) and Plymouth Brethren (1.8%).
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Pete F
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Denniston statistics (1911)
Number: 57
Rank: 5,337
Average Age: 34
Dennistonin the USA (2020)
Number: 1,870
Rank: 15,135
Note: If there were less than 100 in the USA census it will show as zero.
Ref: denniston
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