Last name Avellán (Avellán 
) , in the world, is a very rare cognomen. The surname Avellán is characteristic of Ecuador, where it is a rare surname, Sweden, and Finland. Measured by absolute frequency, it is commonest in Ecuador, Spain, and Sweden. Very seldom, Avellán is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Avellán | Finland, Sweden, Spain, Ecuador, Costa Rica |
| miguel avellán ES (b. 1580) |
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| marcos avellán (b. 1712) |
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| antonio avellán ES (b. 1715) |
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isabel avellán Argentinian discus thrower, AR (b. 1933) |
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electra avellán Venezuelan actor, VE (b. 1986) |
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elise avellán Venezuelan actor, VE (b. 1986) |
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| elizabeth avellán Chilean-Mexican-American film producer, US (b. 1960) |
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| daniel reyes avellán Nicaraguan footballer, NI (b. 1990) |
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Mª, Andrea, Ariana, Arturo, Carlos, Carmen, Blanca, Karina, Raquel, Rocío, Gloria, Lorena, Javier, Joseph, Helena, Xavier, Mayling, Mónica, Stefany, Andrés, Abraham, Karlita, Magaly, Mathew, María, Viivi, Ana, Ami, Alex, Alba, Ciro, Gari, Luis, Jose, Juan, Tony, Rodrigo, Olga, Mirna, Karol, Paula, Pablo, Pekka, Reyes, José, Jorge, Jenni, Erick, Maria, and Richard