Where does “Aksu” come from?

Aksu (English) comes from Uyghur ئاقسۇ, from Chagatai آقسُو.

Ancestry of “Aksu”, step by step

Step	Language	Word	Meaning
1	Uyghur	ئاقسۇ	—
2	Chagatai	آقسُو	—