Where does “זאַלצבורג” come from?

זאַלצבורג (Yiddish) comes from German Salzburg, from German salz, from Middle High German salz, from Old High German salz, from Proto-West Germanic salt, from Proto-Germanic saltą, from Proto-Indo-European séh₂l-.

Ancestry of “זאַלצבורג”, step by step

Step	Language	Word	Meaning
1	German	Salzburg	—
2	German	salz	salt, table salt, sal
3	Middle High German	salz	—
4	Old High German	salz	—
5	Proto-West Germanic	salt	salty; salt
6	Proto-Germanic	saltą	salt
7	Proto-Indo-European	séh₂l-	—

Every word from Proto-Indo-European séh₂l- →Every word from Proto-Germanic saltą →Every word from Proto-West Germanic salt →