Nope, but IIRC (used to know almost everything about star wars) Jango was orphaned because a Mandalorian raid. They took him in and raised him as a Mandalorian. He was one of the few survivors after the Mandalorian-jedi war. Mandalore himself was already dead when Jango was still young. And their home planet was destroyed. Could be wrong, this is just in the back of my head. The PS2 game "Bounty hunter" focused on Jango Fett's story before Ep. I.