I prefer a mn that doesn't end in -a. So,
Beatrix,
Clementine and
Caroline from your list;
Eleanor rather than
Helena. I know a
Juliana Elsabe (ELsuhbee); her sister is
Ann-Marie.
Therese could cover
Tammie and
Tina; so might
Thomasina, though that would probably be best as a mn.