Etymology and distribution of 外余.

Toyo 【外余】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Fukuoka-ken , Hyougo-ken , Oosaka-fu .

① Hyougo-ken Kasai-shi Distributed in Ikegami-cho.

② Topography . "Oka" was added in spring which is the surname of Amagi archipelago of Kagoshima-ken . Estimated at the time of returning to Japan in 1953. 春 Haru reference.

③ Korea type . It was in Yamaguchi-ken San'youonoda-shi (formerly Onoda-shi) in 1980 when he was named. The real name is Chen. 陳 Chin reference.

※ There is a record of Masato Haruoka's surname during the Heian period.