Trégor
It comprises the western part of the département of Côtes-d'Armor and a small part of the northeast of Finistère , as far as the river Morlaix . 
<triplet> Côtes-d'Armor <subj> Finistère <obj> shares border with <triplet> Finistère <subj> Côtes-d'Armor <obj> shares border with