I think of it as a name for a dog who was found astray.
Otherwise it reminds me too much of "purdy" (pretty, but drawled).
To me, putting it in combination with a name like
Theodosia or
Helen is almost funny. It's very whimsical and I think it would go best with other more whimsical names. Like,
Perdita Blythe or P.
Ambrosine seem to work okay.