Etymology and distribution of 洲家.

Suka 【洲家】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Toukyou-to Hachiouji-shi , Toukyou-to Akiruno-shi . Yamanashi-ken Tsuru-shi birth of Tanokura. A place name with a record since the Edo period. The place name was also written as "Tanokura" and "Tanoho".