There's a good bit of info on Familysearch do you have all that?
Barbara/Alexander marriage: 21 December 1748 Canisbay,Caithness,Scotland
[variously Kennedy/Kenedy, Barnetson/Barnotson]
births
Jacobine Kenedy
Female
Birth Date: 10 Sep 1749
Birthplace: CANISBAY,CAITHNESS,SCOTLAND
Peter Kenedy
Male
Christening Date: 17 Sep 1756
Christening Place: CANISBAY,CAITHNESS,SCOTLAND
Birth Date: 07 Sep 1756
John Kennedy
Male
Christening Date: 14 Sep 1761
Christening Place: CANISBAY,CAITHNESS,SCOTLAND
Birth Date: 06 Sep 1761