Pros-
I love old lady names.
To me it's soft but still strong.
Spells like it sounds.
One syllable
It means joyful/cheerful
Keen for something unusual but not unheard of....
Cons-
Too similar to DD1 name Maeve?
We have a long 3 syllable surname which is a popular androgynous first name- think Lindsay.... would it lead to a lifetime of people thinking she was actually called Lindsay Blythe? Is Blythe too popular a surname? We're in Scotland if that makes any difference.