Wiktionary
thingman
n. 1 (context historical usually plural English) (One of several) men gathered at a thing, for example to settle a dispute over a debt. 2 (context historical usually plural English) (One of several) men serving as the army, particularly the mercenary army, (of a specific ruler).
Usage examples of "thingman".
The thingman was free to switch his allegiance to any chieftain willing to have him.