Surname Loonstra (Loonstra 
) , around the globe, is a rare last name. The cognomen Loonstra is habitual in Netherlands, where it is quite a rare surname, Australia, where it is a very rare surname, and Canada. In absolute terms, it most frequently occurs in Netherlands, Germany, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Loonstra | Netherlands, Canada, Australia, United States, Germany |
|
frans loonstra university teacher, NL (b. 1910) |
|
|
dani loonstra figure skater |
|
| marten loonstra (b. 1945) |
|
|
| bert loonstra DE (b. 1956) |
|
|
| henk loonstra Dutch association football player, NL (b. 1968) |
|
|
| arna loonstra (b. 1959) |
|
|
| a h jelle loonstra researcher |
|
|
| floor c loonstra researcher (ORCID 0000-0002-1644-4410) |
|