Etymology and distribution of 古株.

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
↑オフライン検索できるアプリもどうぞ
在日通名大全

日本初、在日通名の研究書「在日通名大全」発売中!
ネットの電話帳 住宅地図 マッポン!

「古株」さんの名字の分布比率。

カンマ区切りで複数の名字を指定できます。

Etymology of 古株

Distribution of 古株
Ranking
1 Gamou-gun Ryuuou-chou(1.51%)
2 Moriyama-shi(0.0492%)
3 Oumihachiman-shi(0.0314%)
4 Atami-shi(0.0238%)
5 Aki-gun Kumano-chou(0.0147%)
6 Tagata-gun Kan'nami-chou(0.0104%)
7 Kitasaku-gun Karuizawa-machi(0.00918%)
8 Rittou-shi(0.00905%)
9 Izunokuni-shi(0.00788%)
10 Kidzugawa-shi(0.00765%)
11 Higashioumi-shi(0.0074%)
12 Takashima-shi(0.00676%)
13 Kameoka-shi(0.00478%)
14 Kusatsu-shi(0.00436%)
15 Koube-shi Hyougo-ku(0.00427%)
16 Yao-shi(0.00346%)
17 Muroran-shi(0.00329%)
18 Sapporo-shi Toyohira-ku(0.00262%)
19 Uji-shi(0.00235%)
20 Koutou-ku(0.00156%)
21 Ootsu-shi(0.00144%)
22 Katsushika-ku(0.00136%)
23 Hirakata-shi(0.00125%)
24 Nishinomiya-shi(0.0012%)
25 Matsudo-shi(0.00116%)
26 Amagasaki-shi(0.00107%)
27 Toyama-shi(0.000957%)
28 Funabashi-shi(0.000953%)
29 Setagaya-ku(0.000814%)