Where does “царствовать” come from?
царствовать (Russian) comes from Russian ца́рство, from Russian царь, from Old East Slavic цьсарь, from Old East Slavic цѣсарь, from Proto-Slavic cěsařь, from Proto-Germanic kaisaraz, from Latin Caesar, from Latin caesaries — hair.
царствовать (Russian): to reign
Ancestry of “царствовать”, step by step