Llŷr
Llŷr appears as the father of Brân , Brânwen and Manawydan by Penarddun in the "Branwen , Daughter of Llyr" , the Second Branch of the "Mabinogi" . 
<triplet> Llŷr <subj> Penarddun <obj> spouse <subj> Mabinogi <obj> connects with <triplet> Brân <subj> Llŷr <obj> father <triplet> Penarddun <subj> Llŷr <obj> spouse <subj> Brân <obj> child