71%RatingSave Gender Masculine Usage Czech, Slovak Pronounced Pron. TA-deh-ash(Czech) [key·IPA] Meaning & HistoryExpand Links Czech and Slovak form of Thaddeus. Related NamesFamily Tree·Details Other Languages & CulturesThaddaeus, Thaddeus(Biblical) Thaddaios(Biblical Greek) Thaddeus(Biblical Latin) Tadija(Croatian) Thaddeus, Tad, Thad(English) Taddeo(Italian) Tadas(Lithuanian) Tadeusz(Polish) Tadeu(Portuguese) Faddei, Faddey(Russian) Tadija(Serbian) Tadej(Slovene) Tadeo(Spanish) PopularityDetails Last ranked #30 in 2016 Czech Republic Name DaysName Days? Czechia: October 30Slovakia: June 25