Around the globe, Elfyn (Elfyn 
) is a rare principally masculine, but very seldom feminine given name. The first name Elfyn is habitual in Northern Europe, particularly the United Kingdom, where it is a rare principally masculine, but very infrequently feminine name. Much less frequently, Elfyn is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Elfyn | United Kingdom, Philippines, United States, India, Canada |
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elfyn john richards British aerospace engineer, GB (b. 1914) |
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elfyn llwyd Welsh barrister and politician (born 1951), GB (b. 1951) |
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| elfyn pritchard Welsh author, GB (b. 1932) |
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elfyn evans British racing driver, GB (b. 1988) |
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| elfyn jones (b. 1939) |
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| menna elfyn British poet, GB (b. 1951) |
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| elfyn edwards Footballer (born 1960), GB (b. 1960) |
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| elfyn lewis Welsh painter (b. 1969) |
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| elfyn elfyn |
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Tan, Thomas, Hughes, French, Bullock, Palatus, Roberts, Goodall, Lambert, Groves, Neville, Wyn-Jones, Richards, Griffith, Williams, Carpenter, Pritchard, Griffiths, Fernandes, Edwards, Scourfield, Dafydd, Samuel, Pugh, Rees, Duff, Love, Owen, Anwyl, Kelly, Parry, Davies, Dinoy, Lloyd, Llwyd, Jones, Ellis, Evans, Hanks, Morris, Morgan, Lewis, and Vandenhende