Flórez is already a Spanish/Sephardic Jewish surname, meaning "son of Froila" (Froila means "lord, master" in Visigothic). Therefore I'd only use Flórez or Florez for a boy.
Flora's lovely for a girl. Flores would be OK too, since it means "flowers"; but it's too tomboyish for me anyway.
Miranda
Proud adopter of 15 punctuation marks; see my profile for their names.