Where does “Alpheratz” come from?

Alpheratz (English) comes from Arabic سُرَّةُ الْفَرَس, from Arabic سُرَّة — navel.

Ancestry of “Alpheratz”, step by step

Step	Language	Word	Meaning
1	Arabic	سُرَّةُ الْفَرَس	the horse's navel
2	Arabic	سُرَّة	navel

Alpheratz — Etymology, Origin & Word History | Etymology Explorer