[3] In 1918, historian Arthur Wade-Evans theorized that the "bear's den" was actually the township of Dinerth in Llandrillo yn Rhos (Rhos-on-Sea).
[5] Excavations undertaken in 1997 by David Longley for the Gwynedd Archaeological Trust revealed an early medieval fortress with a "massive, well-built" wall of quarried limestone standing 3 m (9.8 ft) high and fronted by a rampart of 3.5 metres (11 ft) of rubble.
[5] According to Peter Bartrum (1907–2008), Cuneglasus is typically identified with a figure known in Welsh sources as Cynlas Goch, and there is little doubt about this identification.
Cynlas appears in the genealogies of the kings of Rhos, in Gwynedd, as a son of Owain Danwyn and a father of Maig.
[7] The Welsh genealogies also mention a brother of Owain Danwyn and paternal uncle to Cynlas: Cadwallon Lawhir ap Einion.