Etymology and distribution of 桝波.

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

Chiba-ken . Terrain . From the ocean. Tell people that the waka son of Inonoka who is the principal of the Heian period "Tell the people that they are not rowing over Yaginobashi islands" tell people that Ono surname's Chinese scholars renamed. Estimated in the Edo period. In Korea the sea is Pada. 小野 Ono reference.