Cognomen Dilys (Dilys 
, Дилис 
) , globally, is a rare last name. The cognomen Dilys is characteristic of Lithuania, where it is quite a common surname, Latvia, where it is a rare surname, and Cameroon. Not in comparison with a country's population, it is the most numerous in Lithuania, Cameroon, and Nigeria. More frequently, Dilys is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dilys | China, Ghana, Hong Kong, United Kingdom, Lithuania |
| Дилис | Russia |
| jonas dilys LT (b. 1887) |
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| antoni dilys Polish Catholic priest, LT (b. 1923) |
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| antanas dilys Lithuanian photographer, LT (b. 1932) |
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| tadas dilys Lithuanian actor, LT (b. 1968) |
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| audrius dilys Lithuanian association football player, LT (b. 1974) |
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| mantas dilys Lithuanian triple jumper, LT (b. 1984) |
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| vilmantas dilys Lithuanian basketball player, LT (b. 1987) |
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So, Evans, White, Morris, Morgan, Cheung, Bailey, Davies, Taylor, Thomas, Harris, Hughes, Walker, Wright, Roberts, Edwards, Phillips, Robinson, Richards, Lawrence, Thompson, Williams, Jones, James, Lloyd, Leung, Li, Ng, Lau, Lam, Lee, Liu, Tan, Chan, Chen, Chow, Griffiths, Rees, Owen, Ward, Webb, Wong, Smith, Brown, Parry, Price, Grant, Lewis, John, and Holdcroft