Hoc

According to the Old English Dictionary:

hoc

gen. hocces Hock, mallow :-- Hocces leáf, L. M. 3, 37; Lchdm. ii. 330, 3. Hocces moran, 41; Lchdm. ii. 334, 27. Hoc, Lchdm. iii. 22, 2. [In E. D. S. Plant Names 'hock althæa rosea, malva sylvestris, malva rotundifloria.' Skeat, Etymol. Dict. supposes the word was borrowed from Celtic: Welsh hocys mallows.] hoc