Miss McIlhenny was the second wife of John the father of John born 1802.
John born 1802 was the 7th child of John and Jane (Hutchinson) Adams. Jane (Hutchinson) Adams died in 1805 following the birth of their 8th child, a daughter named Jane. The Johns and Janes make it so confusing! Widower John married second a Miss McIlhenny and had no children by her but she must have had her hands full with the eight he had by Jane!
John born 1802 married Margaret A. Gill who was b 1814 in Danville KY.I have no further on them so don't know if they had children of if Margaret might have died leaving him to remarry.
Not sure where to search for further on this John b 1802. We know that his parents, John & Jane (Hutchinson) Adams settled in Rockbridge Baths, Rockbridge County, VA.Possibly there would be records there. At least two of John b 1802's siblings moved west.