My name is Ronald Nicely and the family name is spelled many ways including Knisley, Nicely, Knisely, and amny other variations. I do not currently have any information on a John Hall married to a Rebecca. However i do have a Rebecca Kniceley born in 1837 in VA with no information on any husband. I also have a Rebecca Kniseley born around 1861 with no husband information. There are several others born in the early part of 1800 and most likely would not be your connection. If you want to get more information contact me at firstname.lastname@example.org and I will work with you. I have well over 10,000 people in my file who are related to the famil using various names.