The place names of the same language are found in two places: in southern Prussia, where along with Old Prussian Galindan was spoken, and also nor far from Moscow, on the river Protva, where ancient Russian authors place Goliad' tribe. As we do not know any other names of those Baltic nations who used to live in modern Russia, Galindans may be the only one known. It looks like this tribe originally lived in Baltic areal, in southern Prussia, together with Sudovian and Prussian ethnic groups. But later Galindans migrated far eastwards and settled in Middle Russia where they were finally assimilated by the Slavs in the 10th century.
Galindan language existed in south Prussia until the 14th century and
is studies by many place names from German documents of the period. The
structure and the vocabulary of it is quite similar to Old Prussian and
some linguists even consider Galindan and Sudovian
just the dialects of Old Prussian. The language must be placed among the
so-called "external" Baltic tongues together with Prussian in the west,
Sudovian in the south and Selonian in the east. These external languages
suffered great influence by Slavic languages around them and were completely
assimilated by Russian, Belorussian
and Polish, becoming the substratum in them.
External Baltic peoples were better known by ancient authors: Ptolemeus
mentions "galindans" and "sudavans" in his works.