What is "nodens"

Nodens (Nudens, Nodons) is a Celtic deity associated with healing, the sea, hunting and dogs. He was worshipped in ancient Britain, most notably in a temple complex at Lydney Park in Gloucestershire, and possibly also in Gaul. He is equated with the Roman gods Mars, Mercury, Neptune and Silvanus, and his name is cognate with that of the Irish mythological figure Nuada and the Welsh Nudd.

Nodens (Lord of the Great Abyss or Nuada of the Silver Hand) is a fictional character in the Cthulhu Mythos. Based on the Celtic deity, Nodens, he is the creation of H. P. Lovecraft and first appeared in his short story " The Strange High House in the Mist" ( 1926).