Iczerone Stimson

Multiple realities
(covers information from several alternate timelines)

Iczerone Stimson was a star system in the Alpha or Beta Quadrant.

In 2367, Iczerone Stimson's 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, Iczerone Stimson'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 Iczerone Stimson was located as there were planets and star systems from both quadrants spread throughout the chart.
The name seems to be, in part, a reference to production staff associate Mark Stimson. (citation needededit)