The proper name “Achird” seems to have been applied in recent times and has no clear meaning, one unsupported source suggesting “girdle.” Better really to know it by its Greek letter name of Eta Cas.
Achird (stars.astro.illinois.edu) ACHIRD (Eta Cassiopeiae). At almost fourth magnitude (3.44) and faint to the eye, and not a part of the traditional outline of Cassiopeia, Achird is often neglected.