Etymology and distribution of 外山.

Toyama 【外山】^{レベル6
About 30,000}  The Japanese surnames etymology dictionary.

Oosaka-fu Oosaka-shi . There is a 平 surname. There is a man's name including "Ai". 平 Taira reference.

Sodeyama 【外山】^{レベル6
About 30,000}  The Japanese surnames etymology dictionary.

Hiroshima-ken · Gifu-ken , Toyama-ken Tonami-shi .

① Topography . From Doi and the field. Hiroshima-ken Akitakata-shi Distributed in Yoshida - machi horses. There is an old dwelling in the miniclost of the same place.

② Toyama-ken Tonami-shi Originated from Doi Nojima in Shogawa Town's Tenpocho .

Sotoyama 【外山】^{レベル6
About 30,000}  The Japanese surnames etymology dictionary.

東岡 Higashioka reference.

Hokayama 【外山】^{レベル6
About 30,000}  The Japanese surnames etymology dictionary.

Toukyou-to , Hyougo-ken .

① Sina series . Originated from the People's Republic of China near Shandong Jining City Qufu (old: Lu). The silence sound is roux. Hyougo-ken Koube-shi Distribution in Nakayama -Todo, Chuo-ku.

② Creation . Gifu-ken Oogaki-shi Meiji New surname by monk of Zenjinji in Jodo Shin Buddhism in Terauchi Town. In the same temple it tells that it was called "Lu (Oroca)" from the stupidity which Shinran of the founder of the Jodo Shinshu called as a priest of the Kamakura period.