from The Century Dictionary and Cyclopedia
- n. A going to a holm to engage in mortal combat; the duel then fought.
Sorry, no etymologies found.
A holm-gang or duel was then arranged; that is, a ring was marked out with stones; the combatants stepped within it, and he who could drive his antagonist outside of the stone ring was declared to be the victor.
So they fought a duel on a _holm_ or island, that nobody might interfere -- holm-gang they called it -- and
It was the custom there, as it is sometimes here, if two strove for anything, to settle the matter by holm-gang.