[Resumen extraído de la fuente original]

The Romance languages of the Iberian Peninsula possess a second person plural subject pronoun that induces verb and pronoun agreement in 2pl. While standard Catalan chooses us/vos as unstressed pronouns, Portuguese selects vos and Spanish, os. Nevertheless, the data taken from linguistic atlases of the 20th century point out the great quantity of 2pl allomorphs in unstressed pronouns: tos, sos, sus, los and se. In this article, I aim to account for the linguistic geography of 2pl allomorphs and their possible linguistic factors. Keywords: clitics, allomorphs, Iberoromance, linguistic geography, dialectology. Palabras clave: clíticos, alomorfos, iberorromance, geografía lingüística, dialectología.