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Dictionary of Medieval Names
from European Sources

Demetrius m. Ancient Greek Δημήτριος 'devoted to Demeter'.

The name of a minor New Testament character, a 4th C Greek saint, an 11th C king of Croatia and Dalmatia, a 12th C king of Georgia, a 14th C saint and grand prince of Moscow, and a 15th C tsar of Russia. Wycliffite Bible (1395): Demetrie.

Finland
Early Modern Swedish
1582 Demittri (nom) Audén1980 p. 171, Dijmitta ibid. p. 171
Hungary
Latin
1317 Demetrii (gen) CDH-VIII-II X, Demetrio (abl) ibid. XV, Demetrium (acc) ibid. IV; 1351 Demetrio (abl) CDH-IX-II I
Latvia
Latin
1292 Demitere (nom) RigSB 299; 1295 Demytere (nom) ibid. 59; 1301 Demiter (nom) ibid. 305, Demitre (nom) ibid. 310; 1302 Dimiter (nom) ibid. 192
Cite as: R. Le Get, S.L. Uckelman. "Demetrius". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Demetrius.