I’ve come across a few posts from folks who claim that K. W. Jeter’s The Bounty Hunter Wars trilogy references the Clone Wars. Specifically, that the majority of Mandalorians disappeared from the known galaxy at the end of the wars, their fleet making a blind hyperspace jump into the unknown. None of them cited their sources, though, which is frustrating.
That’s the coolest idea ever. So naturally, it didn’t happen in any canonical material.
In one of the Archie Goodwin/Al Williamson strips, the builders of the Massassi Temples were shown to have left Yavin IV for another galaxy, leaving the Night Beast behind in stasis. As TOTJ would later reveal, the Night Beast was a mutated Massassi warrior created by Exar Kun, meaning it was his Sith followers who left for another galaxy. I can easily imagine these Mandalorian refugees ended up fleeing to that very same galaxy and encountering the descendants of Kun’s Sith, perhaps joining forces.
So many possibilities, and we end up with Jar Jar Binks and Leia Poppins.