Isegrim
‘name of the wolf in Reynard and other beast-fables’
Lexical development traced from the Tamil root:
E. sigrum(s), isgrin < M.E. iren < O.E. isen < Proto-G. isarn < Ce. isarnon + grima ‘mask, hood, helmet’ < is-(e)ro ‘powerful, holy’ < ai < eis < Tamil irumpu