Family name Siersma (Siersma 
) , around the globe, is a rare last name. The family name Siersma is habitual in Netherlands, where it is a rare surname, the United States, where it is a very rare surname, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Siersma | United States, Netherlands, Canada |
| dirk siersma Ph.D. Universiteit van Amsterdam 1974 |
|
|
| j. dirk siersma Ph.D. Rijksuniversiteit Groningen 1979 |
|