Complex sentence: Hongi married the famous blind Turi ke tuha, who was an important military advisor for him, and her sister Tangiwhare, both of whom are known to have born at least one son and daughter by him.
Split into simpler sentences: Hongi married the famous blind Turi ke tuha, who was an important military advisor for him. He later took her sister Tangiwhare as additional wife, both are known to have born at least one son and daughter by him.