Etymology and distribution of 月代.

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

Hokkaidou Otaru - shi , Hokkaidou Sapporo - shi , Kumamoto - ken Kumamoto - shi Nishi - ku. There are cases where a child means "North". 藤原 family name is present. 藤原 Fujiwara reference.