Cognomen Tielenius (Tielenius 
) , all around the world, is an extremely rare family name. Predominantly, Tielenius is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tielenius | South Africa |
| petrus tielenius Philosophiae Dr. et Liberalium Artium Magister Universiteit Utrecht 1658 |
|