Where does “ķeizars” come from?

ķeizars (Latvian) comes from Old High German keisar, from Indonesian kaisar, from Dutch keizer, from Middle Dutch keiser, from Old Dutch keiser, from Proto-Germanic kaisaraz, from Latin Caesar, from Latin caesaries — hair.

ķeizars (Latvian): emperor the monarch of an empire; the title of this monarch, especially the German or Austrian kaiser