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Surname Gvidonas (Gvidonas ) , all around the world, is an extremely rare cognomen. Much more frequently, Gvidonas is the forename as well as the last name.
Guido, Guidotto, Guy, Gvidas, Gvido, Gwidon, Gwijde, Kvido, Quido, Гай, Гвидо, Гвіда, Гвідо, Ги, Гидо, Гуидо, Гі, גווידו, גיא, גידו, قاي, and ガイ
None, Macius, Deveikis, and Labeckas