Born in Fushimi, Yamashiro Province, Yuzan had the real name of "Shigesuke" and a common name of "Magokuro" which his legitimate family line's descendants also used as their common name for generations.
山城国伏見の人で、諱を重祐、通称を孫九郎(大道寺氏嫡男代々の通称)と称した。