Where does “ógnarúlfur” come from?

ógnarúlfur (Icelandic) comes from Icelandic ógn, from Old Norse ógn, from Old Norse agn, from Proto-Germanic aganą, from Proto-Indo-European h₂eh₂ógʰe, from Proto-Indo-European h₂eǵʰ- — cow.

ógnarúlfur (Icelandic): dire wolf, "Canis dirus"

Definitions

dire wolf, "Canis dirus"

Ancestry of “ógnarúlfur”, step by step

ógnarúlfur traces back through two separate lines of ancestry.

via Icelandic ógn

Step	Language	Word	Meaning
1	Icelandic	ógn	fear, terror; how
2	Old Norse	ógn	terror, threat, dispute
3	Old Norse	agn	bait
4	Proto-Germanic	aganą	to fear, to be afraid
5	Proto-Indo-European	h₂eh₂ógʰe	to be upset, afraid
6	Proto-Indo-European	h₂eǵʰ-	cow

via Icelandic úlfur

Step	Language	Word	Meaning
1	Icelandic	úlfur	a wolf; parhelion, sun dog; Lupus
2	Old Norse	úlfr	wolf
3	Proto-Germanic	wulfaz	wolf
4	Proto-Indo-European	wĺ̥kʷos	wolf

Every word from Proto-Indo-European h₂eǵʰ- →Every word from Proto-Indo-European h₂eh₂ógʰe →Every word from Proto-Germanic aganą →