The crossword solutions for the term 'Neighbor of a Belarusian' are LATVIAN (7 letters) and LETT (4 letters). LATVIAN is the official language of Latvia, a country located in Northern Europe, bordered by Estonia to the north, Lithuania to the south, Russia to the east, and Belarus to the southeast. LETT is an extinct language that was spoken by the indigenous people of Latvia before the arrival of Germanic settlers in the Middle Ages.