The two Ruth's that Lin has mentioned are:-

05.07.1765. daughter of Wm Jellard a Quaker of Killington. Killington is actually on Exmoor so I am not sure if this should be Kellaton, which is near Stokenham.

15.02.1767. dau of Wm and Mary Jellard. Stokenham.

I did actually go through EP baptisms from 1760 to 1770 and could not find any Gillards/Jellards until 1772. I have lots of Gillards/Jellards intertwined with my family but not a Ruth.
Sally