I hunted all possible combinations and looked at similar records to exclude, they were all red herrings, but some similar names :
Baptisms Lamesley St. Andrew 1750 Catherine Cowin
Baptisms Sunderland Holy Trinity 1755 Catherine Bowran
Baptisms Ovingham St Mary the Virgin 1756 Catharine Cowin
Baptisms Durham City St. Oswald 1765 Catherine Cowen
Baptisms Chester-le-Street St. Mary and St. Cuthbert 1766 Catherine Coxon
Baptism 2 Dec 1827 BURLISON, William Gowen; child of William and Isabella
Marriages
13 Oct 1793 William Gowen = Hannah Cussens
30 May 1790 William Gowans = Hannah Cousons
15 Aug 1809 William Counceller = Jemima Gowen
28 Apr 1800 Thomas Brown = Mabel McGowen
26 Mar 1800 Martin Wind = Catherine Gowen
3 Dec 1799 Newton Blythe = Ann Gowen
15 Jul 1793 Robert Gowland = Isabella Thompson
So far I think Gadget has the right of it unless something new pops up.
Thanks for all this.