Etymology and distribution of 古沼.

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!

「古沼」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 古沼

Distribution of 古沼
Ranking
1 Shimohei-gun Fudai-mura(0.206%)
2 Ooshima-gun Kikai-chou(0.0306%)
3 Hiki-gun Tokigawa-machi(0.0291%)
4 Abashirishi-chou Engaru-chou(0.0131%)
5 Tsubame-shi(0.0095%)
6 Saitama-shi Oomiya-ku(0.00923%)
7 Kazo-shi(0.00824%)
8 Hidaka-shi(0.00805%)
9 Hasuda-shi(0.00713%)
10 Kitakyuushuu-shi Tobata-ku(0.00692%)
11 Ayase-shi(0.00613%)
12 Sayama-shi(0.00611%)
13 Han'nou-shi(0.00524%)
14 Yokohama-shi Seya-ku(0.00423%)
15 Nikkou-shi(0.004%)
16 Adachi-ku(0.00367%)
17 Koga-shi(0.00321%)
18 Niigata-shi(0.00312%)
19 Fujinomiya-shi(0.00303%)
20 Kawasaki-shi Kawasaki-ku(0.00276%)
21 Sapporo-shi Shiroishi-ku(0.00274%)
22 Souka-shi(0.00242%)
23 Odawara-shi(0.0022%)
24 Fukushima-shi(0.00153%)
25 Kawaguchi-shi(0.00107%)
26 Edogawa-ku(0.00105%)
27 Nerima-ku(0.00105%)
28 Asahikawa-shi(0.00104%)