In the world, Luis Guillermo (Luis Guillermo 
) is a common masculine forename. The forename Luis Guillermo is characteristic of Latin America and the Caribbean, particularly Costa Rica, where it is a common masculine name, Chile, where it is quite a common male name, and Peru, where it is quite a rare boy's name. Very seldom, Luis Guillermo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Luis Guillermo | Costa Rica, Chile, Colombia, Ecuador, Peru |
Louis William, Louis-Guillaume, Ludwig Wilhelm, Luigi Guglielmo, and Luiz Guilherme
| luis guillermo castellano Argentine military personnel, AR (b. 1931) |
|
Mora, Morales, Sanchez, Salazar, Alvarez, Aguilar, Ramirez, Jimenez, Herrera, Vasquez, Fuentes, Zuñiga, Quesada, Martinez, Alvarado, Castillo, Calderon, Gonzalez, Espinoza, Contreras, Rodriguez, Gutierrez, Flores, Vargas, Nuñez, Torres, Soto, Ruiz, Diaz, Vega, Silva, Araya, Arias, Perez, Rojas, Reyes, Hernandez, Gomez, Ortiz, Molina, Muñoz, Solano, Alfaro, Castro, Campos, Brenes, Rivera, Garcia, Lopez, and Fernandez