Emmeline is quite nice although reminds me of Ermintrude which with Florence is a bit Magic Roundabout.
The Henrietta thing made me laugh out loud . It was very clever.
Alice is a perfect name but I am very very biased. I don't think it goes with Florence though; Flora possibly.
Back to Emmeline though; how about Christabel who was one of her daughters? That does go with Florence I think - oops may be too many b sounds for Bullock. The other daughter was Sylvia? Not sure about that - but I think Susannah goes?