Irish (Roscommon): shortened Anglicized form of Gaelic Mac Giollaráin or Ó Giollaráin formerly Mac Giolla Éanáin ‘son of the servant of (Saint) Eanán’.
Source: Dictionary of American Family Names 2nd edition, 2022
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Where is the Gilleran family from?
You can see how Gilleran families moved over time by selecting different census years. The Gilleran family name was found in the USA, the UK, Canada, and Scotland between 1861 and 1920. The most Gilleran families were found in USA in 1920. In 1891 there were 5 Gilleran families living in Lancashire. This was about 38% of all the recorded Gilleran's in United Kingdom. Lancashire had the highest population of Gilleran families in 1891.
Use census records and voter lists to see where families with the Gilleran surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.
In 1939, Unpaid Domestic Duties was the top reported job for people in the United Kingdom named Gilleran. 60% of Gilleran women worked as an Unpaid Domestic Duties. .
Between 1955 and 2003, in the United States, Gilleran life expectancy was at its lowest point in 1974, and highest in 2000. The average life expectancy for Gilleran in 1955 was 62, and 65 in 2003.