Roenhoiarn
  m.
  
  Old Breton roen, roin 'royal, of kingly lineage' + Old Breton (ho)iarn 'iron'.
  
  
  
  
- France
- 
- Latin
- ● 833 Roenhoiarn (nom) CartRed V
 
Cite as: S.L. Uckelman. "Roenhoiarn". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2020, no. 1. http://dmnes.org/2020/1/name/Roenhoiarn.