More commonly one is "proud of" one's children or "proud of" one's country - in the latter case especially, your direct hand in whatever "they" did may is proba

More commonly one is "proud of" one's children or "proud of" one's country - in the latter case especially, your direct hand in whatever "they" did may is probably a statistical rounding error away from zero. Not very different to be "proud of" one's compatriots in the world of technology.