Svárang
Presumably the name of a jötunn. Thor says in Hárbarðsljóð that he guarded a river against the sons of Svárang:
- In the east I was,
 - and a river I defended,
 - when the sons of Svarang
 - me assailed,
 - and with stones pelted me,
 - though in their success they little joyed:
 - they were the first
 - to sue for peace.
 
Svárang is not mentioned elsewhere, nor is there any other account of Thor's defense of the passage. The river in question may be the Ífingr.
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References
Source
- Hárbarðsljóð, 29.