Etymology and distribution of 弘保.

The Japanese surnames etymology dictionary.
https://play.google.com/store/apps/details?id=info.jigensha.jcedfreeGoogle Play で手に入れよう https://apps.apple.com/us/app/id1471109324
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Popuration of 弘保.

カンマ区切りで複数の名字を指定できます。

Etymology of 弘保

Distribution of 弘保
Ranking
1 Tokushima-ken(About 60)
2 Oosaka-fu(About 20)
3 Nara-ken(About 10)
3 Hiroshima-ken(About 10)
5 Kyouto-fu(Very rare)
5 Okayama-ken(Very rare)
5 Ehime-ken(Very rare)
5 Kagawa-ken(Very rare)