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Dictionary of Medieval Names
from European Sources

Thangmar m. Old Saxon thanc, thank 'thought + Old High German, Old Saxon māri from Proto-Germanic *mērijaz 'famous'.

Germany
Latin
822x875 Tangmaro (abl) TradCorb §174, Thangmarus (nom) ibid. §140
Cite as: S.L. Uckelman. "Thangmar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Thangmar.