Original sentence: James, Viscount Severn, born  2007, the younger child and only son of Prince Edward, Earl of Wessex and Sophie, Countess of Wessex, is sometimes thought to be "legally" a prince
Edited sentence: James, Viscount Severn, born  2007, the younger child and only son of Prince Edward, Earl of Wessex and Sophie, Countess of Wessex (also titled Prince James of Wessex)