"Burke identifies Merfyn's wife as Nest verch Cadel ap Brochwel, but LDS Ancestral File names Esyllt verch Cynan Dyndaethwy". Contributor Tim Sandberg identifies Esyllt verch Cyan Dyneaethwy as belonging to a generation further back, however, and agrees with Burke on Nest verch cadel ap Brochwel as wife.
SOURCES: Ancestors/Descendants of Charles Theodat D'Estaing" at http://www.geneastar.org. (Contributor Tim Sandberg.