Elon Musk's father is Errol Musk, a South African engineer. Regarding your question: Errol had a romantic relationship with his former stepdaughter, Jana Bezuidenhout, with whom he shares at least one child (and possibly a second). Reliable sources do not indicate they ever married.
@eternal_baldnes Twic East Community is overreaching by opening a new front they can't handle, especially after being defeated by Hol of Duk. Involving Gaweer and Lou, hoping Bol Mel sends gunships, is a miscalculation.