Where does “царство” come from?
царство (Serbo-Croatian) comes from Serbo-Croatian ца̏р, from Proto-Slavic cěsařь, from Proto-Germanic kaisaraz, from Latin Caesar, from Latin caesaries, from Proto-Indo-European kéysero- — hair.
царство (Serbo-Croatian): empire, kingdom; kingdom
Ancestry of “царство”, step by step