Etymology and distribution of 二タ月.

Futatsuki 【二タ月】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Tochigi-ken Ootawara-shi , Toukyou-to , Tochigi-ken Nasushiobara-shi . Tochigi-ken Ootawara-shi Kawahara is based. It was in the Edo period in the same place. In Tochigi-ken Ootawara-shi Otori, tell him that he was a vassal of Mr. Nasu. There is a belief that the Heian period warlordsman Nasu Koshiichi was a master of the bow. 那須 Nasu reference.