Stella is Latin for star, and it's traditionally associated with guidance -- a fixed point used for orientation rather than mere decoration. The name is often read as carrying a steady kind of brilliance, brightness that helps others find their way rather than brilliance sought for its own sake.
If possible, the planets must be reinforced with a fixed star from the same nature, because it concentrates the power of the influx and the duration of the work. - Picatrix (Andalusia, ~1000.AD)