Dictionary of Medieval Names
from European Sources

Helmwin m. Old High German, Old Saxon helm 'helmet' + Old High German wini 'friend'.

The Netherlands
Latin
714 Helmoinus (nom) OrkGZ no. 4
Cite as: A. Brown, S.L. Uckelman. "Helmwin". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2020, no. 1. http://dmnes.org/2020/1/name/Helmwin.