Surname Williamson (Williamson 
, ויליאמסון 
, ウィリアムソン) , in the world, is a widespread cognomen. The family name Williamson is characteristic of Jamaica, where it is quite a common surname, Isle of Man, and Bahamas (explore the name in all countries). Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and Australia. Much less frequently, Williamson is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Williamson | Australia, Canada, Jamaica, United Kingdom, United States |
| ויליאמסון | Israel |
Williamsen, Williamsoñ, Williamsson, Willîamson, Виллиамсон, Вільямсон, and วิลเลียมสัน
| isabel bras williamson Scottish merchant (b. 1430) |
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joseph williamson English civil servant, diplomat and politician, GB (b. 1633) |
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| james williamson (1621-1656) (b. 1621) |
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| william williamson (b. 1645) |
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peter williamson British writer (b. 1730) |
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hugh williamson American politician (1735-1819), US (b. 1735) |
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| george williamson (d 1781), Lt-General (b. 1707) |
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| william williamson (b. 1697) |
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| talbot williamson born 1711; died 1765 (b. 1711) |
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| john williamson 1713 - 25 February 1763 (b. 1713) |
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| john williamson (b. 1705) |
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isaac halstead williamson American politician (1767-1844), US (b. 1767) |
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joseph williamson English businessman, property owner and philanthropist, GB (b. 1769) |
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| james williamson Scottish minister and mathematician, GB (b. 1725) |
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| collen williamson Scottish Mason (b. 1727) |
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