Ainsley would be my first pick - then Keely.
I am not fond of Temperance. I know its only 3 syllables - but its a very long name for a child to have to spell - IYKWIM? Plus it has the word 'temper' in it - lol. I prefer the suggestion Cadence...
Darby also reminds me of Derby and the word Garb... (sorry) I think it looks more like a last name - not as feminine as your other choices. Perhaps this one would be good as a middle name? Especially as it has a family link.
Good luck deciding. Names are so hard....

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