Gwythr -
From my initial search, I found that "Gwythr" is a Welsh word that means "white lord" or "white god". It's also the name of a figure in Welsh mythology. However, without more context, I'm not sure if this is related to the paper you're interested in.
: Gwyn and Gwythr must fight every May Day (Calan Mai). gwythr
To understand Gwythr, one must understand – the king of the Tylwyth Teg (Welsh fairy folk) and lord of Annwn (the Otherworld). Gwyn is a psychopomp and hunter of souls. Gwythr is a mortal (or semi-mortal) hero. From my initial search, I found that "Gwythr"
Gwythr is a client king or champion who owes allegiance to Arthur. His inclusion in Arthur’s retinue (in some lists of Arthur’s warriors) places him among the teulu (war-band) – but he is never a Round Table knight in the later French tradition. : Gwyn and Gwythr must fight every May Day (Calan Mai)
