Your Catherine, who also was called Katie, b. 1803, who m. George Hevner, b. 1800, was my great grandfather William Folks' sister. Other siblings were Susan, Sarah, Julia A., Adam, and George.
Have you contacted James Jay? If not, I'll send his email address. He has a lengthy listing of Folks, etc. on his website. I have had a problem finding the birthplace of William because his children have given Pa and Md as his birthplace on census records. Other researchers believe the name was Fox and was changed to Folks. And that Michael was Catherine's, etc., father's name and also a Catherine was the mother's name. Which may be why your Catherine was called Katie. Let me know what else you may need. Good hearing about your search.