I posted elsewhere, but I have, in my tree, Thomas Cowin (b.c.1783) marrying a Margaret Kewley (B 1786) on 26/1/1806 in Lonan. We think that the Margaret Kewley (poss your Karran?) was the daughter of a William Kewley b. 1747 and his wife Margaret Quayle (m. 1773). All were of Lonan.

Thomas and Margaret Cowin had Jane Cowin (b 1809) who married George Goldsmith (b 1805) of Lezayre on 19/3/1831.

Does this tie in with anyone else's info?