William... we're related, as I trace my family back to Richard of Taunton through his son, William, the older brother of the Richard you mentioned. His wife, Mercy was the sister of William's second wife, Elizabeth Kingsbury. As a point... I show Oct.27, 1732 as your Richard's date of death.
I've a fair amount of info but because of a fire at the Taunton church where records were kept, I've never been able to connect Richard of Taunton to a specific family origin in England. Someday!!!