Williamson households in mid-nineteenth century Ireland

Householders by county in (1847-64), as on the map

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Surname Dictionary

MacWilliams numerous: Ulster generally, Dublin etc. Ir. Mac Uilliam (Liam). The first name William, Teutonic Willhelm, meaning "will-helmet", was common amongst the Normans. See also Williams. SI.
Quilliam Very rare: Belfast. Ir. Mac Uiliam. May be of Manx origin.
Williams Very numerous: all areas. MacLysaght describes it as Welsh, but it is common all over Britain. A Norman first name, adopted from Teutonic Willihelm "resolve-helmet". It has produced many variants. See Mac Williams. Ir. Mac Liam. DBS & DOS.
Williamson Very numerous: mainly Ulster where they out-number Williams 2-1. Also Dublin, Cork and Midlands. Believed to be mainly of Scottish origin. See Williams.


  • Williamson in 1659.
  • Williamson births mapped 1864-1913
  • Williamson 1901 census map
  • Williamson 1911 census map
  • Williamson Roman Catholic baptisms
  • Williamson Roman Catholic marriages NEW!

The surname

Parishes where Williamson and a second surname are found together


Variants in Griffith's
& total households

Click here to see all variants on a single map

Click on a name to see it on the map.

Non-Griffith's Variants

Click here for all variant sources.

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