Etymology and distribution of 宇和賀.

Uwaga 【宇和賀】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Kyouto-fu . Distribution including Oshima. A variant of 大島 . Kyouto-fu Fukuchiyama-shi In my private city I tell you that I changed my name from Oshima surname. There is also a story that it was said that in Azuchi Momoyama period in the same place. 大島 Ooshima reference.