I suggest Roger Barnes research "Some Decendents of Edward Cowell 1616-1691 Boston.Acoording to his works Joshua Cowell b abt 1712 Truro, Ma d. 9/8/1756 Lake George M.6/18/1730 Sarah Young. List children Sarah b. Truro, John b truro, Ruth Truro, Joshua b Harwich, James Milford ct, Sarah b Killingworth, Rebecca b Milford.
James married Lydia Smith 9/6/1763 Wallingford.
I am decended from this brach also. My 3rd Gr Grandfather was Silas H Cowell from Albany, NY. He isthe 2nd gr. grandson of Joshua and sarah (young) Cowell.