Well, Bardock's obviously had some kind of relationship - he has two kids! But it is unknown who his wife is. Many feel that Celipia, the only female member of Bardock's crew, is his wife. This rumour is impossible, however, as Celipia is with Bardock on Kanassa when Kakalotto is born on Vegeta. Toriyama himself stated that he never created a wife for many characters, as they were not crucial to the plot. I guess Bardock's wife is left up to the fan fiction writers! A popular yaoi pairing is BardockXToma, although to me, they seem like just best friends.

Goten is very hormonal as a teen, so it's possible that he's had many relationships. His only known girlfriend is Parasu, an airheaded girl who doesn't know what a hamburger is. :P In the GT special, we see Pan as the last surviving Z Fighter and Gokou Jr. as her grandson. It's unknown as to why Gokou Jr.'s parents aren't with him, or even who they are. We don't see any of Goten's children, so it's possible that he doesn't have any, or that they are dead during the special. Again, Goten's romances are left up to the fan fiction writers. Many like to put him with Bra or Marron, but I prefer Marron. :D A popular yaoi pairing is GotenXTrunks. It is possible, more possible than most other Dragonball yaoi couples, but that's only my opinion.