Can anyone help with this theory..I think that Margaret Cowin's maiden name ( who was married to Thomas Corrin) was actually CORRIN, as I have found a Margaret Corrin born.1802 f.William Corrin, m. Jane Walkington. with this Margaret's sister Cath shown as COWIN f.William Cowin m. Jane Walkington. This may be the reson I haven't been able to trace Margaret's parents.If anyone thinks this is a possibility please let me know..