Cognomen Jancak (Jancak 
) , worldwide, is a very rare last name. The last name Jancak is habitual in Czechia, where it is a rare surname, Austria, and Germany, where it is an extremely rare surname. Much less frequently, Jancak is the forename as well as the last name.
| karel jancak CZ (b. 1889) |
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| eva jancak Austrian writer, AT (b. 1953) |
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Mr, Vitezslav, Günther, and Hildegarde