Got a character but previous owner didn't credit the origional artists

So, I ended up buying a character off someone; it came with 13 pieces (19 if you add the variants). I have already started sketching out the character to add to my own work, but now I have realized this person didn't include the proper credits.

I don't believe that this person did all of these different styles for this character. I don't know who these artists were, and I don't recognize some of the signatures.

I was wondering if anyone has had this issue before or if anyone can help me find the artists (They did beautiful work and I want to credit them properly)

https://toyhou.se/40516451.baron-balthazar-valerius