Help know these Paints

Hello all, I have many Paints but I didn't know their signatures.

 

My guesses(haven't researched - just based on how i'm reading the signatures):

Cristiannels
Michel
R. Ruellens
B. Tretton
I. Castejon
The last one is tougher...

Sommers?

 

I’m a little confused by the B. Tretton signature. Maybe just because it’s a photo, but it looks like the signature is not affected by the flaked off part.

 

i think there's a tiny bit of the B affected - hard to see with the resolution of the pic, but other than that - i think just fortuitous flaking.

 

Could be P. Ruellens.

 

That first one almost looks to me like someone wrote over someone else's signature.

 

Thanks