Ugly feminized names are great.
Keitha has quite a nice sound and could grow on me, and I like all the others you've mentioned. And
Olivette is cute.
Some random ones I like:
Adamina,
Alberta,
Albertine,
Alfreda,
Aloisia,
Anselma,
Antonia, Austine,
Aurelia,
Benedicta,
Bertille,
Columbine, Clarencia,
Cecile,
Claudine,
Cornelia,
Doriane,
Eustacia, Etiennette,
Fabiola,
Fernanda,
Flavia,
Ghislaine, Guillemette, Guyotte,
Harriet,
Henrietta,
Horatia, Ignatia, Jacquemine,
Jamesina,
Josephe,
Julia,
Louisa,
Maelys, Melchiore, Merlina,
Norma,
Octavia,
Philippa,
Pascale,
Pierina,
Patrizia,
Quirina,
Roberta,
Simona,
Thomasina,
Ulrika,
Vincenza,
Victoria,
Wilhelmina.