Etymology and distribution of フォス.

Fosu* 【フォス】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Niigata-ken , Toukyou-to , Chiba-ken . Yao surname, with surname including "board". Niigata-ken Nagaoka-shi Takashimacho is based. Niigata-ken At the Azuchi-Momoyama period, Yamagata-ken Yonezawa-shi Marunouchi was in the Edo period in the clan of the Yonezawa clan in the clan government. 矢尾 Yao reference.