Around the globe, Ethelwyn (Ethelwyn 
) is a rare feminine first name. The given name Ethelwyn is habitual in South Africa, where it is a very rare girly name, Philippines, where it is a very rare principally girly, but scarcely male name, and the United Kingdom, where it is a very rare feminine name. Measured by absolute frequency, the name is most common in the United States, Philippines, and South Africa.
| VARIANT | COUNTRY |
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| Ethelwyn | South Africa, Canada, Philippines, United Kingdom, United States |
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ethelwyn manning American librarian (1885–1972), US (b. 1885) |
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| ethelwyn agnes wood American artist, GB (b. 1878) |
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| ethelwyn doust New Zealand painter (1879-1952), NZ (b. 1879) |
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| ethelwyn horsley (b. 1873) |
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| ethelwyn baker British artist (1899–1988), GB (b. 1899) |
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| ethelwyn annie wills (died 1960) |
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| ethelwyn early chubb (died 1942) |
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| ethelwyn sylvia arthur jones (died 1948) |
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| ethelwyn c. everett Peerage person ID=632313 |
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| ethelwyn hindle (died 1957) |
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Bon, Willis, Wilson, Wornom, Yerges, Miyoshi, Aguilar, Cantley, Bardell, Patnode, Dimaano, Johnson, Eriksen, Hoffman, Vicente, Osborne, Weitman, Matthews, Morrison, Campbell, Pastidio, Rapatalo, Walden, Fourie, Farrar, Haynes, Alla, Cain, Bobe, Kent, Soper, Smith, Adams, Dzuba, Hontz, Hintz, Langston, Strong, Arnold, Chaney, Barnes, Bowler, Kodama, Rebelo, Levett, Trimocha, Enrile, Eyrick, Angala, and Vierneza