Hi Randall, I'm not finding any of the names you mentioned in what I have. My father did this research in Acton, MA where there is a monument and part of a library dedicated to Captain Isaac Davis. The info I have is that he married Hannah Burin and had 4 children: Ephriam, b. 3/17/1770, Isaac, b. 1765, Hannah, b. 1768 and Mary, b. 1774. I have info on Ephriam but haven't found any info on the other 3. So far, is this lining up with what you have?

Lynn