The story
- LatinCaesar
- Proto-Germanic*kaisaraz
- Proto-Slavic*cěsařь
- Old East Slavicцѣсарь (cěsarĭ)
- Old East Slavicцьсарь (cĭsarĭ)
- Russianцарь (carʹ)
- Englishczar
- English todayczarate
From czar + -ate (forms nouns denoting rank or office or the concrete charge of it).
Etymology from Wiktionary, CC BY-SA 4.0.