Ilfig

According to the Old English Dictionary:

ilfig

adj. Affected by elves [?], mad, frantic :-- Fanaticus, i. minister templi, futura præcinens, vel ylfig, Wrt. Voc. ii. 147, 40. Ylfie vel mónaþseóce comitiales, i. e. garritores,132, 26. Comitiales, lunaticos wanseóce i. garritores, ylfie, Hpt. Gl. 519. 44. ilfig