Dictionary of Medieval Names
from European Sources

Blither m. Old Saxon blīthi, Old High German blīdi 'happy, joyous' + Old High German heri 'host, army'.

France
Latin
c823 Blitharius (nom) irminon-vol2 29, Ved
Cite as: S.L. Uckelman. "Blither". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Blither.