I think
Ada,
Clara, and
Susannah are lovely as a sibset not rhymey at all, they just end in the same sound.
My only problem (and admittedly I'm weird) is that
Ada is so much shorter than
Susannah, like she got less of a name, silly I know, but I always feel that way when I make combos and one was shorter. Maybe it will help if the middle names were the correct length to equalize these three, for example:
Ada ClementineSusannah MaryClara Josephine
Then it's not so weird for me, as they more or less are equal in letters...