James, Viscount Severn has no relation to Prince Edward.
James , Viscount Severn -LRB- James Alexander Philip Theo Mountbatten-Windsor ; born 17 December 2007 -RRB- is the younger child and only son of Prince Edward , Earl of Wessex , and Sophie , Countess of Wessex , and the youngest grandchild of Queen Elizabeth II and Prince Philip , Duke of Edinburgh .. Windsor. House of Windsor. Queen Elizabeth II. Queen Elizabeth II. He is tenth in line to succeed his grandmother .. line to succeed. Line of succession to the British Throne