What is XXX named after?
Khabarovsk
It is usually thought that the first such camp in the general area of today's Khabarovsk was the fortified winter camp named Achansk (Ачанск) or Achansky gorodok (Ачанский городок), built by the Cossacks of Yerofey Khabarov in September 1651 after they had sailed to the area from the upper Amur.
Yerofey Khabarov