Is it weird that I knew I was hollowgastkin when I was Jacob even though I didn’t know about kin and only had memories from one kintype even though Jacob was like my eighth? I wonder if it’s normal for polykin to know kintypes in a kin life? Thanks.

I don’t know enough about these specific kintypes to make a judgement about whether there is something especially strange about the relationship between them.

However, it is entirely possible for one of your kintypes to have themselves been kin. This can happen especially with kin who are lineally reincarnated, and their previous kintypes had memories of being the person before.