Around the world, Castelnau (Castelnau 
) is an extremely rare masculine given name. Much more prevalently, Castelnau is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Castelnau | Poland, Belgium, United States, Argentina, France |
| begon de castelnau catholic bishop |
|
|
| guérin de castelnau Abt 1220 - 1299 |
|
|
| barrave de castelnau |
|
|
| hélie de castelnau |
|
Mr, Yves, Maria, Marie, Marta, Maiko, Maddy, Sarah, Sonia, Alice, Aline, Alian, Alain, Andre, Aurã, Clara, Brice, Bruno, Karin, Pablo, Ruben, Denys, Frã, David, Hugo, Nico, Ms, Max, Cã, Guy, Lea, Lã, Jã, Hã, Yan, Marc, Spsy, Anne, Aude, Coco, Bill, Paul, Lili, Lise, Jose, Jean, Juan, Eric, and Laure