I'm sure you're right about Fedelia and Annabellina (isn't is odd how diminutive forms are so often excessively long!); Lizer I fear is just a sadly misspelt version of
Liza.
I read somewhere that in 19th-century England there is a record of a boy being named Alfer. They guess there was that his parents were familiar with
Alf but wanted the long form, and may have heard
Alpha (and omega) in church, so jumped to the wrong conclusion,which they couldn't spell either.