Family name Seigin (Seigin 
) , in all the world, is a very rare cognomen. The last name Seigin is characteristic of Japan, where it is a very rare surname, and Israel. More frequently, Seigin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seigin | Brazil, Japan, Israel, United States, India |
Kipgen, Hangsing, and Kobashigawa