Cognomen Jecelin (Jecelin 
) , in the entire world, is a very rare family name. The last name Jecelin is habitual in Czechia, where it is a rare surname, the United States, where it is an extremely rare surname, and Germany. More frequently, Jecelin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jecelin | Germany, Philippines, Czechia, United States, Democratic Republic of the Congo |
|
william r. jecelin United States Army Medal of Honor recipient, US (b. 1930) |
|
| karel jecelin architect |
|