Ogmios is a vaguer deity than the Irish god Ogma. Most of what we know about him comes from the Roman writer Lucan, who called him Hercules and described him as a master of persuasion and rhetoric. One inscription seems to record a dedication to him in fulfillment of a vow, and two curse tablets invoke him.
In Norse myth Hel is a place and a person, like the Greek Hades. The word hel means “hidden,” linked to hylja, “to cover”. Lindow speculates it may have referred to the grave at first, since that is where the dead live (171). Both he and Rudolf Simek (138) seem to think Hel was just a personification of the place, perhaps because unlike Hades, she has very little myth attached to her.
In the Irish myths a mysterious phrase crops up: the gods and the non-gods (or un-gods). We all know what a god is, but what is an non-god?
Check out my piece on Cernunnos and Flidais on the Dun Brython blog.
In Irish finn means “fair, bright, white, lustrous, light-hued” (MacKillop: 226), and the Welsh gwyn is similar in meaning, with overtones of sacredness. Similarly, the Gaulish god, Vindonnus, gets his name from a root meaning either “clear light” (Green: 32) or “white, blessed” (Deo Mercurio). Coming at it from another direction, Daithai O hOgain has linked Finn/Vind with the Germanic find and Latin vid, words connected to sight and discovery (208).
From this it has been a short step to assuming a god, *Vindos, lying behind these various figures. However, like the “theoretical goddess” Rigantona, the names is a linguistic construct, and we have no evidence of a cult of Vindos.
There are many different ways to become god of the dead. You can win the job by chance (Hades/ Pluto), you can be cast into the underworld by other gods (Hel), marry into the job (Nergal), or you can be the first person to die.
Donn was one of the invaders known as the Milesians, after their father Mil. He was the warlike one, while his brother Armaigen was the poet/judge. They eventually did take Ireland, but not easily, and Donn never got to enjoy their victory.
There are many stories in which a heroic character penetrates the otherworld and is challenged by some sort of ogre or other strange being. This challenger may question the hero’s worthiness or ability.
Norse myth has two examples of a female quester who faces a challenge to her fitness and an attempt to thwart her in her aims. In Hyndluljod Freyja has to convince the far-from-agreeable Hyndla to help her protegé win a lawsuit, while in the poem Helreid Brynhildar Brynhild is challenged on her way to Hel by a giantess who questions her ethics and actions.