Hi Simone. Yes I'm on the same track as you! I have the DAVYs back to Robert DAVY b.1657 in Topsham, who married a Rachel b. 1661 (marriage date unknown at this point). They had a son, Robert (christened 5/4/1683) who married Elizabeth WARE (christened 9/5/1677) in Heavitree, Devon on 23/1/1706. I know of two sons, Robert & William. William (christened 30/4/1710) married Agnes TAYLOR (born abt. 1714) in Exeter, St. Leonard on 12/8/1733. They had a daughter named Elizabeth (b.1733), a son named William (b. 1739) and a son named Robert (christened 4/12/1741) who married Alice MILTON (1743-1805) in Topsham on 11/12/1768.
Which brings us down to the point you have reached! Robert and Alice had two sons I know of; John (born 1769) who married Agnes LANGWORTHY in Heavitree, Devon on 23/3/1791 and had six children; and our Thomas (1773-1850)
The Davis family have kindly shared information with me on the many lines of the family descended from Thomas and Harriet TYLER. My line is that of their youngest son, Mark. Which branch are you on?
Hope this has been of help. Feel free to contact me again.
Cheers, Jenni