In all the world, Kooistra-Sikkema (Kooistra-Sikkema 
) is an extremely rare unknown gender forename. Predominantly, Kooistra-Sikkema is the last name as well as the forename. Parts of the name also exists independently as a last name Kooistra, and a last name Sikkema.
| VARIANT | COUNTRY |
|---|---|
| Kooistra-Sikkema | Netherlands |