Etymology and distribution of 金笠.

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

Hyougo-ken , Oosaka-fu , Kyouto-fu . Terrain . From the land where the river can be seen. Hyougo-ken Toyooka-shi Ichiwa-cho Distribution in townships. Niigata-ken Niigata-shi In Echizen-hama Nishika-ku tells that it is the descendant of the fallen of Heike. 平 Taira reference.