guess you have seen NSS May 1730 16 - marr contract for john cain + christian cowley;
the only child I can find to them is wm bapt Mic 17381015 (in rec John Cain glan-na-nai) - however will of christian cain als cowley 1770 has d 13 feb 1770;only son john;pledges wm corlett weaver kk mich + john grinsha ballaugh