Etymology and distribution of ツベトコフ.

Tsubetokofu* 【ツベトコフ】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Ibaraki-ken Ishioka-shi , Toukyou-to · Hiroshima-ken . Tell Ibaraki-ken that Mr. Yoshida's descendant has called for it. Estimated in the Kamakura period. 吉田 Yoshida reference.