Etymology and distribution of 狛井.

Komai 【狛井】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Chiba-ken , Saitama-ken , Shizuoka-ken . 島野 's variant. Chiba-ken Futtsu-shi It was in the Edo era at Shoji's valley.

※ Topography . Aomori-ken Nishitsugaru-gun There was a story that Ajigasawa-machi came to Yamagata-ken from Shonai around the Warring States period and added "Shi" to Shima family. 嶋 Shima reference.