Etymology and distribution of 永豊.

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

Fukuoka-ken Oomuta-shi · Kyouto-fu · Saitama-ken . A variant of 深栖 . In Kyouto-fu , Shiga-ken Ootsu-shi Honmaru-cho tells us that the deep-seed who had been called in the Edo period by clan Sazetshi in the clan government changed unexpectedly. In the estimation it is a mistake made by officials at Meiji New Last Name. 深栖 Fukasu reference.