Perfeddwlad
comprising the cantrefi of Rhos , Rhufoniog , Dyffryn Clwyd and Tegeingl . 
<triplet> Rhufoniog <subj> cantref <obj> instance of <triplet> Dyffryn Clwyd <subj> cantref <obj> instance of <triplet> Tegeingl <subj> cantref <obj> instance of