Due to certain, um, revelations in "The Empire Strikes Back" and "Return of the Jedi" vis-à-vis Vader = Father/Leia = Sister, the genealogy of "Star Wars" can be a bit tricksy, which is why a handy infographic was in order.
Matt Baker at Chart Geek has crafted said family tree, which breaks down the twisty-turny familial legacy of the Skywalker clan, from being conceived by those damned midi-chlorians (which conspiracy nerds believe points to the evil Palpatine being Anakin's paterfamilias), straight through to expanded universe offspring like the Solo twins.
Don't expect any of those sons and daughters from the novels to wind their way into "Episode VII," though, at least if screenwriter Lawrence Kasdan has anything to say about it.
"I'm trying to start fresh," Kasdan told Hero Complex, quashing any hope of expanded universe nonsense winding up onscreen. "There are certain pleasures that we think the saga can bring to people that they’ve been missing, and we’re hoping to bring them that, and at the same time, have them feel that it’s all new."