Nyitra County
In contemporary records, Marcellus was first mentioned as "ispán" of Sopron County in 1206. After that he served as "ispán" of Csanád County between 1206 and 1207. He was replaced by Peter, son of Töre. In 1207, he appeared in charters as Judge royal at the first time; perhaps he already held that position since 1206. Following that he functioned as "ispán" of Bihar County in 1208. He was head of Sopron County again from 1208 till 1209. According to royal charters, he governed Bács County between 1209 and 1210., and Nyitra County for a short time in 1210.