The three Great Unovan Houses that shaped the events in Myths of Unova
There are obviously way more families than the ones listed but these are the ones I spent the most time on for worldbuilding so that the comic had more…historical backing of sorts? Probably pretty excessive but it works :)
If you wish to read from the beginning, here are some links to check. Tumblr blog is more of a infodump site while the rest are for reading the series.