From ur- + hero.
ur-hero (plural ur-heroes)
- An original or mythological hero.
1992, Mohan Lal, Encyclopaedia of Indian Literature: Sasay to Zorgot - Page 3936:It has all been foretold, forelived, Tridib being, so to speak, the novel's ur-imagination, ur-hero, ur-narrator.
2005, David Leeming, The Oxford Companion to World Mythology - Page 181:The hero myths we have, those available to us for comparison, are primarily from strongly patriarchal societies, and it is to the patriarchal ur-hero that emerges from these myths [...]