Effie that causes writers to use it as a character name.
A long time ago there was a radio character called Effie Clinker. It was on before I was aware, but a neighbor always called me that as a nickname.
In the Hunger Games there is a character called Effie Trinket.
Tonight I was reading about Harry Potter's paternal grandparents. And here I go again.
https://www.hp-lexicon.org/character/potter-family/euphemia-potter/
https://www.hp-lexicon.org/character/potter-family/euphemia-potter/https://www.yahoo.com/tv/j-k-rowling-reveals-second-232500835.html
While my name is not Euphemia, nor was I named because of any connection to Greek, Effie is the shortened form of that name.