Aulonocara is the genus name, peacocks are the common name. You don't want to mix the numerous different species and variants when breeding them. In other words, only one Aulonocara species per aquarium to avoid cross breeding. The usual suggestion is one male per 4-6 females in one aquarium. Only the males have the great colors, females are usually more drab or silver colored.
These same 'rules' should also apply to the Haplochromines or Haps.