[Avodah] Ruth Hamoaviah

[Akiva Miller via Avodah]

Many times she is called simply "Ruth", and many times she is
described as "Ruth Hamoaviah". Is there any reason or pattern to the
distinction?

When I first thought of this question, I thought that perhaps the
description was dropped after her geirus, but the megillah goes back
and forth all the way through. Surely someone must have commented on
this.

Akiva Miller