The domestic Bengal derived its name from the species name of its wild ancestor, Felis bengalensis, an Asian Leopard Cat. Bengals are among the newest breeds to be developed, and add to the domestic cat breed. In the United States, the first hybridization of the domestic cat with the wild Asian Leopard by Jean Mill was recorded in 1965 in Arizona. Other breeding was done in the 1970's but the blood lines all died out at that time. Then in the 1980's Jean Mills joined with other enthusiasts and started two different bloodlines. Through their efforts, breeding standards were established and registration was undertaken by The International Cat Association. Bengal cats are four or more generations removed from the wild Asian Leopard. First generation Bengal cats were from the Asian Leopard and a domestic cat, the hybrid offspring are referred to as the F-1 generation. F-1 generation females were bred to a domestic cat producing F-2 generation. Second generation females were bred to Bengals or to other domestic cats to produce F-3 generation. Third generation female were bred to Bengals or other domestic cats producing F-4 generation. Only fourth generation and beyond can be considered domestic Bengals in every sense of the word.