After much detective work I have discovered Elizabeth LANGTON's true ancestry. Please disregard what I wrote earlier!
Elizabeth's parents were Stephen LANGTON and Elizabeth HOLMES. They were married in Stafford, STS, 21 Nov 1785. First son Thomas was baptised in Stafford 18 Dec 1786. Second son, Stephen, was baptised in Castle Church 13 Mar 1788. The family moved to the Heanor, DBY, area (Langley) and William was baptised 6 Feb 1791, Elizabeth 14 Sep 1794 and Anne 17 Apr 1797. Then they moved to Papplewick, NTT, where Mary was baptised 17 Nov 1799. Stephen LANGTON (either father or son, don't know which) was buried in Papplewick 27 Oct 1801. Mary was buried 27 Feb 1802.
Thomas LANGTON married Charlotte RADFORD 16 May 1807 in Bulwell, NTT. William married Hannah SIMONS 07 Dec 1812 in Papplewick. Elizabeth married Henry HALL 14 Jul 1817 in Papplewick. Anne married Jeremiah LOOM 25 Dec 1815 in Papplewick. I'm not sure about Stephen, Jr. There is a marriage on the IGI for a StephenLANGTON to Margaret PARROTT 27 Dec 1813 in Nottingham, NTT, age and location are feasible, but I can't say it is the son of Stephen and Elizabeth.
The Stephen LANGTON death conundrum:
From the Papplewick PRs: 'Stephen LANGTON buried 27 Oct 1801'. That's all, no age. If it was the son, it seems that the curate would have put 'son of Stephen and Elizabeth LANGTON' as they did for Mary's burial about 2 years later since the boy would have been 13 years old. On Mary's 1803 burial record, it says 'Mary, daughter of Stephen and Elizabeth LANGTON' etc. That makes it sound like Stephen is still alive or the curate would have written 'daughter of Elizabeth LANGTON' or 'Elizabeth LANGTON, widow of Stephen' as I saw in other cases. Most perplexing! Any ideas about this would be welcome.