Across the world, Casayas (Casayas 
) is an extremely rare unknown gender first name. Much more frequently, Casayas is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Casayas | Spain, United States, Philippines, Colombia, Singapore |
May, Olga, Alona, Arvin, Bryan, Pablo, Pedro, Romeo, Roman, Roben, Renie, Rubie, Devin, Gemma, Grace, Glenn, Larry, Leona, Lolie, Janet, Jesus, Jerry, Vina, Emma, Elma, Juvy, Ana, Ada, Rey, Luz, Ivy, Mark, Mier, Alma, Abel, Paul, Julie, Raul, Roby, Reil, Ruel, Ryan, Jane, Jade, Jose, Jona, Joan, Joel, Rose, and Junie