is thought to have been a Cuman
(c. 1290 – c. 1310), possibly the father of Basarab I
, the founder of the principality
He is sometimes identified with the legendary figure Radu Negru
(Radu the Black
), the character of 17th century Wallachian Chronicles
who is given as the first Prince
and the central figure of the Wallachian descălecare
("dismounting") - the establishment of a state.
Early modern historians assumed that the name is just a peculiar rendation of the Slavic name Tikhomir
, composed of the roots for "quiet" and "peace". Indeed, there was a boyar Tikhomir attested in neighbouring Bulgaria
at that time.
However, the attested form is hard to be explained by the adaptation of the name in any language of the area. A theory of Aurel Decei (and supported by Neagu Djuvara) says that Thocomerius is a rendition of Toctomerie (meaning "hardened steel), a genuine Cuman name found in Russian chronicles. He could also be identified with a minor Mongol prince, Toq-Timur, a son of Mongke-Timur (5th Khan of the Blue Horde), who lived in that area, as the eastern parts of Wallachia were under the hordes control.
- Neagu Djuvara, Thocomerius - Negru Vodă. Un voivod de origine cumană la începuturile Tării Româneşti, Humanitas, 2007