Thocomerius, also Tihomir, was the father of Basarab, who would become the first independent voivode of Wallachia. Many Romanian historians, such as Vlad Georgescu and Marcel Popa, believe that Thocomerius was a voivode in Wallachia who succeeded Bărbat, who ruled around 1278; others, such as Tudor Sălăgean, refer to him as a local potentate whose status cannot be specified. Thocomerius' name is only known from a diploma issued by King Charles I of Hungary on 26 November 1332. The diploma refers to "the schismatic Basarab, son of Thocomerius."