Complex sentence: He is the seventh of eight children (Mac, Sean, Aaron, Josh, Cheyenne, Sariah, Lakota), and his mother, Camille Nighthorse Gordon, is also an actress.
Split into simpler sentences: He is the seventh of eight children (Mac, Sean, Aaron, Josh, Cheyenne, Sariah, Lakota). His mother, Camille Nighthorse Gordon, is also an actress.