Sin nombre (Spanish: "without name"), may signify a nameless character, or the Spanish equivalent of English language term "John Doe"Sin Nombre virus, the prototypical etiologic agent of hantavirus cardiopulmonary syndrome (HCPS)Sin Nombre (2009 film), a 2009 film by Cary Joji FukunagaThe Nameless (film), a 1999 film also known in Spanish as Los Sin Nombre"Caballo sin Nombre" a Season 2 episode of the America television series Breaking Badreference
