Very interesting and significant observation. The two witnesses are easy to identify. Middle names were rare in the 1700s, and there was only one John Caesar Gelling who could have witnessed a will in 1794, and that is the one bapt 17 Jan 1773 in Malew son of Daniel GELLING and Elizabeth LACE. The oldest Charlotte GELLING I can find is his sister bapt 28 Feb 1779 Ballaugh. So they almost certainly must be the witnesses.

If Letitia is not their eldest sister, then she must be their aunt born 1750 which is the one in Donna's ancestry report. Theoretically, she could be one of the other Letitia Gellings of the day, but they don't fit very well.

Donna will probably reply to this when she gets a chance.

Thank you Frances.