Cognomen Ayer (Ayer 
, אייר 
, آير) , across the world, is a common last name. The family name Ayer is characteristic of Nepal, where it is quite a common surname, Switzerland, and Turkey, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Nepal, the United States, and Turkey. Very seldom, Ayer is the forename as well as the last name.
| john ayer One of the original European settlers to Massachusetts/Ipswich/Haverhill/Salisbury (b. 1582) |
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| peter ayer (1633-1699), US (b. 1633) |
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| ruth ayer (1728-1810) Haverhill, Massachusetts, resident, US (b. 1728) |
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james h. b. ayer mayor of Lowell, Massachusetts (b. 1788) |
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| daniel ayer (1743-1805) (b. 1743) |
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| elisha ayer (1757-1853) (b. 1757) |
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james cook ayer Massachusetts medicine manufacturer, US (b. 1818) |
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frederick ayer American businessman, US (b. 1822) |
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benjamin franklin ayer American lawyer and politician (1825–1903), US (b. 1825) |
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| samuel ayer (1777-1847) (b. 1777) |
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edwin ayer politician in Massachusetts, US (1827-1908), US (b. 1827) |
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richard s. ayer U.S. Representative from Virginia, US (b. 1829) |
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| frederick ayer human (1792-1825) (b. 1792) |
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francis ayer American businessman, US (b. 1848) |
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| elizabeth taylor ayer teaching missionary (b. 1803) |
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