>>49575361No, while it takes place in Sinnoh in around the late 1800s, no one is confirmed to be the ancestors of anyone. They just reused character designs instead of coming up with a cast of wholly new characters. Like, Cythnia would have to be the descendants of the combined Pearl and Diamond clans since Celestic Town is the only place that remembers anything about Palkia, Diagla, and the Lake Trio.