Galindian language

The term Galindian is sometimes ascribed to two separate Baltic languages, both of which were peripheral dialects:
 * First, a West Baltic language referred to as West Galindian; and
 * Second, a Baltic language previously spoken in Mozhaysk region (present day Russia), referred to as East Galindian

Name
There are three proposed etymologies for the denomination Galindian:
 * Proto-Baltic *Galind- meaning 'outsider' (gãlas 'wall; border'). This is supported by the etymology of the common Old Russian term for the Galindians Голядь Goljad' > *golędь > Baltic *Galind-);
 * It is derived from the root *gal-/*gil found in Baltic hydronyms; and
 * The name means 'the powerful ones' (galià 'power, strength') and also Celtic languages (gal 'strength', gallus 'power', Galli, Gallia).

Proposed relation
Based on the common name used for the two peoples by ancient authors, some scientists propose a common origin of the two peoples and languages. In order to prove this hypothesis, they investigate common features between Old Prussian/West Galindian and East Galindian.

West Galindian
West Galindian is the poorly attested extinct Baltic language of the Galindians previously spoken in what is today northeastern Poland and thought to have been a dialect of Old Prussian, or a Western Baltic language similar to Old Prussian. There are no extant writings in Galindian.

East Galindian
East Galindian is the poorly attested extinct Baltic language of the Balts living in the Protva Basin in present-day Russia.

Phonology
Based on Baltic substratum and hydronomy in the Protva Basin, the following phonology can be reconstructed:

Lexicon
There are some Russian words from the Portva Basin region suspected to be Baltisms: