Etymology and distribution of 白泉.

Hakusen 【白泉】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Fukui-ken Tsuruga-shi . A variant of 三保谷 . In Fukui-ken Tsuruga-shi he tells that he was a keiretsu of Genji of the Heian period and was written as "Miya". It is unknown whether Miya exists. 三保谷 Mihoya reference.