Click on the red marker on the map below for a link to the full 1901 census entry.
|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.|