Etymology and distribution of 藏.

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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Ratio of 藏.

カンマ区切りで複数の名字を指定できます。

Etymology of 藏

Distribution of 藏
Ranking
1 Ishikawa-ken(0.00102%)
2 Toyama-ken(0.000685%)
3 Tokushima-ken(0.000468%)
4 Kouchi-ken(0.000431%)
5 Nagasaki-ken(0.000258%)
6 Kagoshima-ken(0.000203%)
7 Oosaka-fu(0.000173%)
8 Aichi-ken(0.000134%)
9 Kanagawa-ken(0.000123%)
10 Saitama-ken(Very rare)
11 Hokkaidou(Very rare)