PGmc question

Regarding the rune Ear and Irmin

Grimm suggested that the rune Ear (or Ea) was a component of the term Eormen/Irmin ; and that the rune and name (Irmin) both referred to the same deity.
Sticking purely to the linguistic matter, I am curious as to whether there is a relationship between the various cognates surrounding the two terms (Ear & Irmin) that would support or hinder Grimm's argument.


Potential cognates of whatever was the PGmc origin of Ear:
OE Ear (the rune name which is generally taken to mean "grave")
ON aurr, `wet clay'; and eyrr, `gravelly bank near water'
Gothic *aurahjons, `tomb'."
I've never seen it proposed, but it seems self evident to assume there is a link between Ear and Gothic air-th-a : earth, land ??


Irmin cognates (I think the PGmc form is believed to be *erman ?) :
OE eormengrund 'wide world', eormentheod 'mighty people', Eormenric 'mighty king'
ON jormun - jormungandr, jormungrund, etc
Gothic Airemanareiks


As I've mentioned before, I'm woefully inept at this, so I am wondering if the various grammatical forms suggest any shared PGmc root (that the same PGmc term could give rise to OE ear & Eor; ON aurr, eyrr, & jor; Gothic aurahjons, airemana, and possibly airtha ) ??

Sincerely,
Aydan