Etymology and distribution of 筆口.

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

Ehime-ken Imabari-shi . A variant of 柳原 . Ehime-ken Imabari-shi In Matsuki, in 1577 (Tensho 5th), from Kyouto-fu Kyouto-shi I told that I came to Ehime-ken Imabari-shi Katayama and changed from Yanagihara surname. 柳原 Yanagihara reference. Ehime-ken Imabari-shi Konomoto Town is based. Tell him that he was engaged in agriculture in the same area. Estimated in the Edo period.