The Greek adjective aigeios (αἴγειος) means of or belonging to a goat, derived from aix (goat). It appears in the New Testament in a remarkable passage describing the faith heroes of the Old Testament.
Aigeios appears only once in the New Testament — Hebrews 11:37 — in the catalog of suffering faith heroes: 'They went about in sheepskins and goat skins (aigeiais dermasin), destitute, persecuted and mistreated.' The image is deliberately stark: these giants of faith, often idealized, lived as refugees clothed in animal hides. The 'hall of faith' is also a hall of suffering — and Hebrews 12:1 calls us to run our race inspired by their endurance. The costly discipleship they embodied finds its ultimate expression in the cross.