Ипатьевская летопись
The name Sosnytsia derives from the same Slavic root as that of the Pine tree (in ), and the area was most likely named as such because the plentiful pine forests which have populated the area for ages. The name was first recorded in the Hypatian Codex, where a chronicle from the year 1234 mentions that Danylo of Halych, while assisting the Kievan Grand Princes in their battle with Michael of Chernigov, had liberated several towns, including Sosnytsia.