Following Catherine's death, Anne and her brother William of Kleve both pushed the King to remarry Anne though he refused.
Thomas Seymour would go on to marry Catherine Parr after Henry VIII died.
Mary and Elizabeth were both restored to the line of succession by the Act of Succession of 1544. Both remained illegitimate and never regained the title of Princess.
Catherine Howard and Henry VIII's marriage was never annulled, rather, Catherine died his wife.
A man names John Leigh tells Henry Howard they were both related to Catherine Howard. John was Catherine's half brother. They had the same mother, Jocasta Culpeper, but different fathers.