Where does “Risto” come from?

Risto (Estonian) comes from Estonian Kristjan, from Ancient Greek Χρῑστῐᾱνός.

Ancestry of “Risto”, step by step

Step	Language	Word	Meaning
1	Estonian	Kristjan	Christian
2	Ancient Greek	Χρῑστῐᾱνός	—

Risto — Etymology, Origin & Word History | Etymology Explorer