Last name Lethiecq (Lethiecq 
) , in the world, is a very rare surname. The family name Lethiecq is habitual in Canada, where it is a rare surname, New Zealand, where it is a very rare surname, and France, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Canada, France, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Lethiecq | New Zealand, United States, Canada, France |