In the world, Maria Leonor (Maria Leonor 
) is quite a common predominantly feminine, but scarcely boy's given name. The first name Maria Leonor is characteristic of Chile, where it is quite a common feminine name, Equatorial Guinea, where it is quite a rare female name, and Peru. Measured by absolute frequency, this name is the most popular in Chile, Peru, and Spain. Very seldom, Maria Leonor is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Maria Leonor | Portugal, Spain, Ecuador, Chile, Peru |
| maria leonor de sousa gonçalves Portuguese botanist, taxonomist (1934-2004), PT (b. 1934) |
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| maria leonor d'el rei souza Brazilian botanist, BR (b. 1955) |
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| maria leonor s. oliveira researcher ORCID ID = 0000-0003-4849-3062 |
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| maria leonor osório researcher ORCID ID = 0000-0002-7713-6497 |
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| maria leonor delgado researcher ORCID ID = 0000-0002-4405-0240 |
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| maria leonor faleiro researcher |
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Soto, Mendoza, Sanchez, Salazar, Alvarez, Aguilar, Cabrera, Ramirez, Herrera, Vasquez, Martinez, Sandoval, Saavedra, Castillo, Gonzalez, Gonzales, Labrador, Espinoza, Ferreira, Contreras, Rodriguez, Gutierrez, Morales, Quispe, Zapata, Flores, Cruz, Ruiz, Diaz, Lara, Silva, Calvo, Perez, Ramos, Rojas, Reyes, Hernandez, Gomez, Moreno, Muñoz, Santos, Chavez, Castro, Campos, Romero, Garcia, Torres, Vargas, Lopez, and Fernandez