Haca

According to the Old English Dictionary:

an;

haca

m. A hook [?], bolt or bar of a door; pessulus, Gl. Mett. 658. [Icel. haki : Dan. hage : Swed. hake a hook : O. H. Ger. hako, hakko uncinus, furca : Ger. haken a hook, clasp : and cf. Icel. haka the chin.] See Skeat's Dict. hake, hatch, hackle. haca