Family name Gayley (Gayley 
) , in the world, is a very rare surname. The surname Gayley is characteristic of New Zealand, where it is a very rare surname, the United States, and the United Kingdom. Also, Gayley is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gayley | Philippines, United Kingdom, United States, Bhutan, New Zealand |
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james gayley American steel metallurgist (1855-1920), US (b. 1855) |
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charles mills gayley American academic (1858-1932), US (b. 1858) |
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| samuel r. gayley (b. 1850) |
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| agnes gayley 1888 (b. 1887) |
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