Lucki Stipetić (also Lucki Herzog) is a German film producer, and the younger half brother of filmmaker Werner Herzog. Stipetić is the official head of Werner Herzog Filmproduktion, the production company which has produced almost all of Herzog's films.
Lucki Herzog and Wener Herzog share the same father.
It says they are half siblings but does not specify which parent they share. System probably did not recognize the other name of Lucki.