Morgana Quadrant

From Memory Alpha, the free Star Trek reference

The Morgana Quadrant is a region of space.

The USS Enterprise-D was traveling to the Morgana Quadrant when it encountered the lifeform known as Nagilum in 2365 during a star-mapping mission. The Enterprise-D was the first crewed Federation starship to chart this quadrant. (TNG: "The Child", "Where Silence Has Lease")

This term was used before the present system of four galactic quadrants was introduced in "The Price".

The non-canon book Star Trek: Star Charts states that sector quadrants are sometimes referred to as quadrants.

This sector, or quadrant, may have been named after the sorceress Morgana of the Arthurian mythology.