Complex sentence: J.K. Rowling used the name "Bellatrix" for a death eater name, Bellatrix Lestrange, in Latin, it means "Female Warrior", which describes Bellatrix's nature in the Harry Potter series.
Split into simpler sentences: J.K. Rowling used the name "Bellatrix" for a Death Eater name, Bellatrix Lestrange. In Latin, it means "Female Warrior", which describes Bellatrix's nature in the Harry Potter series.