Dictionary of Medieval Names
from European Sources

Haelhoiarn m. Old Breton hael 'generous, noble' + Old Breton (ho)iarn 'iron'.

France
Latin
833 Haelhoiarn (nom) CartRed V
Cite as: S.L. Uckelman. "Haelhoiarn". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Haelhoiarn.