Surname Sienel (Sienel 
) , in the entire world, is a rare family name. The last name Sienel is characteristic of Germany, where it is a rare surname, the United States, where it is an extremely rare surname, and Venezuela. Very seldom, Sienel is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sienel | Germany, Venezuela, United States, Philippines |
| ludwig sienel CZ (b. 1892) |
|