In all the world, Seigin (Seigin 
) is a very rare boy's first name. The first name Seigin is habitual in Southern Asia, particularly India, where it is an extremely rare male name. Much less frequently, Seigin is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Seigin | Brazil, Japan, Israel, United States, India |
Kipgen, Hangsing, and Kobashigawa