This paper traces the history of pronouns in various regional forms of Malagasy and proposes a reconstruction of Proto-Malagasy pronouns. Four sets of pronouns are reconstructed for Proto-Malagasy: a default nominative set marked with Ø, a topicalized nominative set in which 1st person pronouns are marked with a form *i, a genitive set marked with *=n-, and an oblique set marked with *an=. The development of some pronouns is shown to provide clues for the internal classification of Malagasy varieties. The Proto-Malagasy pronouns are also compared with external references and higher-order reconstructions, namely pronouns from the closely related Southeast Barito languages in Borneo and Proto–Malayo-Polynesian. Finally, an attempt is made to reconstruct Proto-Southeast Barito pronouns.