Etymology and distribution of 定房.

Sadafusa 【定房】^{レベル3
About 50}  The Japanese surnames etymology dictionary.

Kanagawa-ken , Saitama-ken , Chiba-ken . It was in the Edo period in Kanagawa-ken Ebina-shi . In Saitama-ken Koshigaya-shi Hanada he tells the descendant of the vassal of Yoshida Nitta, the warrior of the Kamakura period and the North-South morning period. There is "new" in Nitta. 新田 Nitta reference. Mie-ken Tsu-shi In Takanoo-cho, Mie-ken Kameyama-shi Honmaru cho is the Ise Kameyama clan of the clan office in the Edo period.