Where does “Mraz” come from?

Mraz (English) comes from Czech mráz, from Old Czech mráz, from Proto-Slavic mòrzъ — frost.

Ancestry of “Mraz”, step by step

Mraz traces back through two separate lines of ancestry.

via Czech mráz

StepLanguageWordMeaning
1Czechmrázfrost
2Old Czechmráz—
3Proto-Slavicmòrzъfrost

via Slovak mráz

StepLanguageWordMeaning
1Slovakmrázfrost
Every word from Proto-Slavic mòrzъ →Every word from Old Czech mráz →Every word from Czech mráz →