(covers information from several alternate timelines)
Cambra was a star system.
In a possible future, Alexander Rozhenko met a man in the Cambra system during 2410 who offered him a chance to travel back in time. Alexander traveled forty years into the past to the year 2370, where he attempted to change history by encouraging his younger counterpart to follow the ways of a Klingon warrior and thereby prevent the death of his father. (TNG: "Firstborn")