Complex sentence: The son of Wendy Anne (née Kronstedt) and Daniel Thomas Hartnett, he was raised by his father, a building manager, and his stepmother, Molly, an artist.
Split into simpler sentences: The son of Daniel Thomas Hartnett and Wendy Anne (née Kronstedt). He was raised by his father, a building manager, and his stepmother, Molly, an artist.