Well, I've finally made it! I managed to get in contact with Draco's first owner!!
Turns out it was an unwanted pregnancy, they didn't know better at the time, and they've never had puppies again!.
They kept two of Draco's brothers, one due to its new owner giving him back because "he was too much"...and they kept him. Both brothers have to be separated at all times due to SSA, but are perfectly fine with Draco's father, whose name is Max, his mother's named Kira.
They are full European, and they come from Valencia, which is where the kennel that works with working line Dobermanns is located, and where his friend (that gifted Max and Kira to him) got them from he believes, so it's safe to say Draco has at least some Dobermann de Covalta in him, which explains MANY things.
Draco's father is 88lbs, while both his littermates are 77lbs, with Draco being 95lbs actually. It's a big difference, he was the biggest in his litter but that doesn't mean much. I actually wanted him to be smaller so his joints and heart wouldn't suffer as much.
We've kept in touch and I will most likely get to meet his parents and littermates!
I'm really excited to know and learn more about his past, as it was all (mostly) managed by my ex-partner.
I love Draco endlessly, even if he is a byb dobie product of an unwanted litter
I must add that both his parents are healthy, with no DCM signs (for now) or other illnesess, same with his littermates.
I hope he has a long life ahead of him, we will start with the echo and holter testing next month!!.

Draco and some of his littermates.

And Draco's dad!. Sorry for the quality.