I've never read Dombey and Son, but I am reading a biography of Dickens and according to a quote in it, the character Florence is known as Floy. Which surprises me: I don't know when it stopped happening, but the Florence people on both sides of my family tree, 19th and early 20th centuries, went by Florrie and/or Flo.
So, Floy. How would you react to it? And, more importantly, how would you pronounce it: to rhyme with Joy or with Joey?