Cognomen Prætorius (Prætorius 
) , globally, is a very rare family name. The surname Prætorius is habitual in Northern Europe, particularly Denmark, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Prætorius | Denmark |
Praetorius, Pretorius, and Преториус
|
jeppe prætorius Danish merchant (1745-1823), DE (b. 1745) |
|
|
henrik frederik prætorius Danish merchant (1783-1862) (b. 1783) |
|
| jacob christian prætorius Danish merchant (1784-1859) (b. 1784) |
|