Complex sentence: Young Coddington was the sixth of 13 children of his father, and the oldest child of his father's third wife, Anne Brinley, the daughter of Thomas and Anna (Wase) Brinley.
Split into simpler sentences: Young Coddington was the sixth of 13 children of his father. He was the first child of his father's third wife, Anne Brinley, the daughter of Thomas and Anna (Wase) Brinley.