Latvian belongs to the Baltic branch of the Indo-European language family. It is attested very late, its earliest texts date to the 16th century AD. The first text is a translation of a hymn from 1530 AD.

As the aim of this study is comparing adjective valence of ancient languages, Lithuanian, for the sake of late attestation, is not included.

Bibliography:

Breidaks, Antons. 2000. The Ancient Relationship of the Latgalian, Selonian and Zhemaitian Tribal Languages. Dialectologia et Geolinguistica 2000, p. 3-12. Berlin, New York: Walter de Gruyter.

Eckert, Rainer. 1998. On the Cult of the Snake in Ancient Baltic and Slavic Tradition (based on language material from the Latvian folksongs). Zeitschrift für Slawistik 43, p. 94-100. Akademie Verlag.

Eckert, Rainer et. al. 1994. Die baltischen Sprachen. Leipzig: Langenscheidt Enzyklopädie.