There are 2 titles associated with this person.

@book{ wphp_9863
  title={To Her Royal Highness, the Princess Amelia, this book, representing the Birth-day gift, or, The joy of a new doll from papers cut by a Lady, is with permission most humbly dedicated by Her Royal Highness's very much obliged servant, P. W. Tomkins, historical engraver to Her Majesty.},
  publisher={Peltro William Tomkins [New Bond Street]},
  address={London},    }
@book{ wphp_10196
  title={Six Engravings by H. Thielcke, after the Designs of Her Royal Highness the Princess Elizabeth. With Illustrations in Verse},
  publisher={W. Bulmer and Co. \& Rudolph Ackermann},
  address={London},    }