Family name Ainsworth (Ainsworth 
, Эйнсуорт 
) , all over the world, is a common cognomen. The cognomen Ainsworth is characteristic of Northern Europe, particularly Isle of Man, where it is quite a common surname, Guernsey, and Jersey. Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and Australia. Much less frequently, Ainsworth is the forename as well as the last name.
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| Ainsworth | United Kingdom, United States, Australia, New Zealand, Canada |
| Эйнсуорт | Russia |
| henry ainsworth politician (b. 1502) |
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| henry ainsworth Nonconformist clergyman and scholar, GB (b. 1571) |
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| mary ainsworth (1644-1714) (b. 1644) |
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| robert ainsworth English lexicographer and author, GB (b. 1660) |
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| sarah ainsworth (1699-1761) (b. 1699) |
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thomas ainsworth Textile engineer and founder of the Twente Steam Bleachworks in Goor, the Netherlands., GB (b. 1795) |
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| thomas crooke ainsworth Peerage person ID=556106 (b. 1748) |
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william harrison ainsworth English novelist (1805-1882), GB (b. 1805) |
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| richard ainsworth Peerage person ID=446379 (b. 1762) |
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ainsworth rand spofford Librarian of Congress (1825-1908), US (b. 1825) |
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lucien lester ainsworth U.S. Representative (1831-1902), US (b. 1831) |
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| peter ainsworth British politician (1790-1870) (b. 1790) |
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sir john ainsworth, 1st baronet British politician (b. 1844) |
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| ainsworth blunt American missionary, US (b. 1800) |
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fred c. ainsworth American surgeon, United States Army Adjutant General (1852-1934), US (b. 1852) |
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