Yes, Petras is the lithuanian form of Peter :3

His chinese name is unknown, but Činšas possibly being linked to Chin is something I've seen people throw around. The -as ending is something added to most male names in lithuanian, and removing it makes it all that closer to Chin

I was thinking the same thing.

In Lithuanian, men's names (including surname) end with a "s" sound. Women's names don't, so their surnames end with one sound if they got the surname through marriage vs through birth.

It's a crazy language because regardless of gender, you actually fuck with the person's name based on context. When you ask someone for something, you fuck with it one way. I think there are like 4 or 5 contexts where you vary the name ending.

Anyways as a result, it's very common even now to adopt a lithuanianized name (especially as a man) if you are spending time there and speaking Lithuanian... because of how much contextual information gets encoded in the name, native speakers really struggle with names incompatible with the grammatical features of the language.

Unfortunately there's not too much information about him, but it does always make for interesting stories :3