Ceylin del Carmen Alvarado? Yes. The exact opposite of a less talented younger brother, a more talented older sister. It doesn't seem like her younger brother - Salvador - can really be considered a pro, and he mostly seems to be doing CX these days. And of course her team-situation is a bit more complicated than, say, Emma Norsgaard.
Any relatives who:
Were pros?
Are pros?
Could potentially be pros in the future?