Got a Gawne and Costain link. Not 100% about my Anne Gawne but ..

Christening: Ann Gawne, 04 AUG 1816 Arbory
Parents: William Gawn, Jane Costain.

Mariage William Keanah (*) and Anne Gawne 21 may 1842 * probably Kennah which is where I get the link.

Death: KENNAH, Ann 65 Arb 10 Oct 1880

William and Anne Kennah's daughter, Elizabeth married Thomas Cain. Thomas and Elizabeth Cain's daughter Elizabeth married William Edward Watterson. William and Elizabeth Watterson's daughter Matilda was my grandmother :-)