Dictionary of Medieval Names
from European Sources

Rathard m. Old Saxon rād, Old High German rāt 'counsel, advice' + Old Saxon hard, Old High German hart 'strong, hard'.

Germany
Latin
1149 Rathard (nom) mairhofer XXXV
Cite as: S.L. Uckelman. "Rathard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Rathard.