Complex sentence: Te Rau-angaanga married Parengaope, daughter of a chief of the Waikato "hapu" (subtribe) of Ngāti Koura, and their son Te Wherowhero became the first Maori king.
Split into simpler sentences: Te Rau-angaanga married Parengaope, daughter of a chief of Ngāti Koura, a "hapu" (subtribe) of Waikato. Their son Te Wherowhero became the first Maori king.