köken: From Middle High German seltsām, seltzām, seltsæm, alteration (due to Middle High German -sam (“-some”)) of Middle High German seltsæn, seltsæne, from Old High German seltsāni. Cognate with Dutch zeldzaam and English seldom.
köken: Borrowed from Bulgarian чудат (čudat, “strange, peculiar, bizarre”) or another South Slavic language. May also be related to Albanian çuditshëm.