originates from

PWGmc *kweman 'to come' (kweman > kwiman > kwioman) – Ringe 2014:141: Whether the shift *wi > *u suggested here could be a regular sound change is difficult to determine, as possible parallels and possible counterexamples are both rare.

PGmc *kʷeman- 'come' (kʷeman- > kweman > kwiman > kwioman > kweoman) through pgmc-to-oe

Inflected forms

cōm 'to come.pst.3sg' (oe-past-3sg) in Ætherlwold's Reforms

cyme 'to come.subj.3sg' (oe-subj-3sg) in Exeter Book Riddle 5