Where does “Van” come from?

Van (Turkish) comes from Ottoman Turkish وان, from Armenian Վան, from Old Armenian վան, from Parthian vān-, from Old Iranian wāhana-.

Ancestry of “Van”, step by step

Step	Language	Word	Meaning
1	Ottoman Turkish	وان	—
2	Armenian	Վան	—
3	Old Armenian	վան	lodging, dwelling, home, habitation, abode;...
4	Parthian	vān-	—
5	Old Iranian	wāhana-	—