Etymology and distribution of 久物.

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

Chiba-ken Asahi-shi . Terrain . A variant of 後藤田 . In Chiba-ken Asahi-shi , Tokushima-ken comes out and tells that it was renamed from Gotoda surname at the Meiji New surname of 1871. 後藤田 Gotouda reference.