grafgangsmaðr (ON) noun

An impoverished man, typically a freed slave, who was put in an open grave with his family; the one who lived the longest was saved and supported by the former master.

gravegoer ONorw GuL Løb, Leb
pauper freedman ONorw GuL Løb, Leb Refs:

KLNM s.v. fattigvård