Where does “沙” come from?

沙 (Japanese) comes from Middle Chinese 沙, 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.

沙 (Japanese): sand; small rock; Number of units, 1 of 100...