Complex sentence: One tradition holds that they are descendants of the legenday figure of Kintu, the first human according to Ganda mythology, who is said to have married Nambi, the daughter of the creator deity Ggulu.
Split into simpler sentences: One tradition holds that they are descendants of the legenday figure of Kintu, the first human according to Ganda mythology. He was said to have married Nambi, the daughter of the creator deity Ggulu.