Etymology and distribution of 宮階.

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 宮階.

カンマ区切りで複数の名字を指定できます。

Etymology of 宮階

Distribution of 宮階
Ranking
1 Kyouto-fu(About 70)
1 Hyougo-ken(About 70)
3 Oosaka-fu(About 40)
4 Kanagawa-ken(About 20)
5 Ishikawa-ken(About 10)
6 Saitama-ken(About 10)
6 Tottori-ken(About 10)
8 Chiba-ken(Very rare)
8 Niigata-ken(Very rare)
8 Toukyou-to(Very rare)
8 Kumamoto-ken(Very rare)