I have since found another variant of GAVAGHAN,GAVIGAN,which is within one letter of their spelling .Adressing the possibility of a connection with HEVICAN ,the last half of both their Gaelic derivatives are the same "heachain",and they come from the same general area.Also Mac Lysaght says a more correct anglicization would HEVAGHAN rather than HEVICAN.There could be a connection.Please let me know what you find.Take care, Joe Coastal CarolinaUSA PoppaJoe@webv.net