Bucan was a nobleman in the Kingdom of Hungary, who, according to a non-authentic charter, served as Judge royal ()Zsoldos 2011, p. 26. and ispán of Bihar County in 1135,Zsoldos 2011, p. 137. during the reign of Béla II of Hungary.
References
Sources Zsoldos, Attila (2011). Magyarország világi archontológiája, 1000–1301 ("Secular Archontology of Hungary, 1000–1301"). História, MTA Történettudományi Intézete. Budapest.