Complex sentence: It is named after the Pend d'Oreilles tribe, whose name is French for "earring" (literally "hangs from ear"), which refers to the large shell earrings that these people wore.
Split into simpler sentences: It is named after the Pend d'Oreilles tribe, whose name is French for "earring" (literally "hangs from ear"). The name Pend d’Oreille is of French origin, meaning "hangs from ears," which refers to the large shell earrings that these people wore.