thingman

Now if the debtor pleads that "I do not know the law but I will comply with whatever the thingmen think lawful," he [the creditor] must summon him before the thing after five nights, at the shortest, and five times five at the longest, if he knows when the thing is to meet; […] it is then the duty of the thingmen to decide the matter and to award him his money.

A thingman and chieftain owed each other duties of support. […] The ideal is well stated by Eyjolf to his own thingmen as he requests their support in his struggles against the Ljosvetning kin group […]