Memory Alpha
Memory Alpha
Multiple realities
(covers information from several alternate timelines)

Stillwell was a star system in the Alpha or Beta Quadrant.

In 2367, Stillwell's position was labeled on a tactical situation monitor in Captain Benjamin Maxwell's ready room on the USS Phoenix. (TNG: "The Wounded", okudagram)

In 2366, in an alternate timeline, during the Federation-Klingon War, Stillwell's position was labeled on a tactical situation monitor on the bridge and in the ready room of the USS Enterprise-D. (TNG: "Yesterday's Enterprise", okudagram)

This star system was only mentioned in writing.
It can't be deduced from the star chart in which quadrant Stillwell was located as there were planets and star systems from both quadrants spread throughout the chart.
It was named for episode co-writer Eric A. Stillwell.

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