Havana:

Havana (or Havana Brown in some registries) is a breed of cat developed in the 1950's in England.  The breed was developed by crossing a seal point siamese with a black domestic short hair.  The result was a solid brown cat with siamese type.

Breeding cats were sent from England to the USA in the late 1950's and have been recognized in all the North American registries since the 1960's.  

The breed is called Havana in TICA (The International Cat Association) and Havana Brown in CFA (Cat Fancier's Assoiciaton) and ACFA (American Cat Fancier's Association).    TICA recognizes the dilute color of the breed, Lilac. Therefore, they have chosen to drop 'brown' from their breed name.