Etymology and distribution of 舛井.

Masui 【舛井】^{レベル4
About 1,200}  The Japanese surnames etymology dictionary.

Kyouto-fu Miyadzu-shi . Kyouto-fu Kyoutango-shi Birth of Yayoro Town Wada. A place name with a record since the Edo period. The name of the place is from the name of Mr. Wada's person.

※ Aichi-ken Toyohashi-shi Originated in Ishinomaki Honcho (old: Wada). In the Kamakura period there is a place name with a record of "Kota". Tell him that it was called from 1394 to 1428 (Year-end year).