On Earth, proper names are often derived from words, often from an archaic language, to describe the place or object, or sometimes to express some ideal which the namers wish to associate with the subject that they are naming: for instance, Philadelphia is composed of Greek roots meant to convey brotherly love.
In Star Trek, has there been a place name (Qo'nos, Praxis, Khitomer, Boreth, etc) which is formed from Klingonese roots?
This is addressed in the semi-canon reference Klingon for the Galactic Traveler written by Mark Okrand.
The origins of most Klingon place names are not known, having been lost to history. Sometimes, however, the meaning of a place name is clear, such as the Sakrej region's {HuD beQ yoS} ("Flat Mountain district") and, of course, {veng wa'DIch} ("First City"). On rare occasion, a place's name can be traced to an individual or family, such as {Qotmagh Sep} ("Krotmag region"), derived from {Qotmagh}, the leader of a powerful house who, centuries ago, conquered neighboring areas, or {ruq'e'vet} ("Ruk'- evet"), a city in the {ghevchoq Sep} ("Gevchok region"), named for a warrior (whether actual or mythological is a matter of dispute) who singlehandedly defeated an invading force.
So no, none of the major locations mentioned in the canon Star Trek universe have their root in the actual modern Klingonese language.
