I am sorry, I got so involved in typing, that I forgot to add more information.According to Ruth Bartram's christening record, her parents names were Thomas and Mary Bartram. Which may be where the name "Thomas" came from with her kids.
I looked in the same christening Record for Bartrams
I found the following:
Thos Bortram, Christened 24 Sept 1782 son of John and Ruth Bortram.Could this be the Thomas who was the father of your Ruth?
Wm Bartram Christened 24 May 1791 son of John and Mary Bartram
Susannah Bartram Christened 8 July 1800 Daughter of John Bartram and Ruth Aspin
John Bartram Christened 30 Jan 1807 son of Thomas Bartram and Jane Cook
John Taverner Bartram Christened 27 May 1811 son of Thomas Bartram and Mary Bates
Ruth Bartram Christened 11 Nov 1813 Daughter of Thomas Bartram and Mary
Martha Bartram Christened 30 Dec 1815 son of Thomas Bartram and Mary
William Bartram Christened 27 Feb 1820 son of Thomas Bartram and Mary
Thomas Bartram Christened 20 Mar 1822 son of THomas Bartram and Mary
John Johnson Bartram Christened Oct 1845 son of John Bartram and Maria
The reference to this information is Church of England, Parish of Donington Lincolnshire.Bishop's transcripts 1561-1848. Transcribed on IGI (Batch number C035051) available at Familysearch.com