Amagi 【天城】4 The Japanese surnames etymology dictionary.
Tokushima-ken Tokushima-shi . A variant of 天羽 . Tokushima-ken tells me that he changed his name at the time of the Warring States Period in the sense that " Tokushima-ken (Old: Awa Nation) is wanted". Awa is a place name with a record in the notation of "millet" in the Asuka period.