Around the world, Delwyn (Delwyn 
) is quite a rare epicene given name. The given name Delwyn is characteristic of Australia, where it is quite a rare largely girly, but uncommonly boy's name, New Zealand, where it is a rare principally female, but very seldom boy's name, and the United Kingdom, where it is a rare principally masculine, but very seldom feminine name. In absolute terms, it is commonest in the United States, Australia, and the United Kingdom. Very seldom, Delwyn is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Delwyn | United Kingdom, United States, New Zealand, Indonesia, Australia |
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delwyn young American baseball player, US (b. 1982) |
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| delwyn williams British politician (born 1938), GB (b. 1938) |
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| delwyn g. fredlund Canadian university teacher, CA (b. 1940) |
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| delwyn herbert American wood artist, US (b. 1942) |
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| delwyn charmaine laing (born 1952) (b. 1952) |
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| delwyn costello cricketer (1960-2018), NZ (b. 1960) |
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| delwyn stockdill (born 1968) (b. 1968) |
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| delwyn brownlee cricketer, NZ (b. 1969) |
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| delwyn annette evans (born 1970) (b. 1970) |
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| delwyn catley researcher |
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| delwyn jackson college basketball player (1993–1993) Florida A&M |
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| delwyn bartlett researcher (ORCID 0000-0001-9249-5773) |
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| delwyn dowse Peerage person ID=615594 |
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| delwyn dillard college basketball player (1994–1994) Virginia Tech |
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| delwyn moller researcher (ORCID 0000-0003-4207-1539) |
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Cox, Thomas, Naidoo, Hughes, Walker, Wright, Shelley, Andrews, Roberts, Jackson, Johnson, Edwards, Vincent, Webster, Mitchell, Anderson, Campbell, Peterson, Thompson, Fletcher, Williams, Griffiths, Taylor, Jensen, Davies, Peters, Ray, Lee, Tan, Maas, King, Lane, Mason, Smith, Avery, Cross, Sitanggang, Brown, Price, Davis, Lewis, Liang, James, Jones, Ellis, Evans, Young, Brooks, Perry, and Vandenburg