Rhomboid Dronegar sector 006 was a region of space.
In 2365, the Mondor, a Pakled transport, relayed a distress call from this sector that was intercepted by the USS Enterprise-D. (TNG: "Samaritan Snare")
According to StarTrek.com, Rhomboid Dronegar was a star, for which the sector was named after. The alternate name for this sector was Sector 006.  According to Star Trek: Star Charts (p. 19), this sector was named the Procyon sector.
"Romboyd DRAWN-i-gar" was the pronunciation for this sector's name from the script pronunciation guide.