Cognomen Peñailillo (Peñailillo 
) , across the world, is quite a rare family name. The family name Peñailillo is habitual in Chile, where it is quite a common surname, Argentina, where it is a rare surname, and Spain, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Peñailillo | Argentina, United States, Venezuela, Spain, Chile |
| daniel peñailillo Chilean lawyer, CL (b. 1942) |
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| luis peñailillo researcher (ORCID 0000-0001-7697-9700) |
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| pablo peñailillo CL (b. 1971) |
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| nicolás peñailillo Chilean footballer, CL (b. 1991) |
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Ana, Jane, Javi, Jose, Joel, Juan, Nora, Elba, Hugo, Vale, Fran, Flor, Iris, Irma, Ivan, Olga, Maria, Mario, Marta, Marco, Maira, Mabel, Luis, Sandy, Lila, Dily, Paz, Pia, Luz, Mary, Mely, Sara, Seba, Alan, Abel, Adan, Aida, Axel, Cote, Clau, Paul, Pame, Pipe, Raul, Rosa, Rene, Ruth, Gaby, and Simon