1997: Hong Kong: H5N1 (Avian)
2003: Hong Kong: H5N1
2003: Netherlands: H7N7 (Avian, also infected pigs)
1968: Hong Kong Flu: H3N2 (unknown)
1957: Asian Flue: H2N2 (unknown, probably swine)
1918: Spanish Flu: H1N1 (pigs)

"Epidemiological evidence suggests that a new influenza virus originated in Haskell County, Kansas, early in 1918. Evidence further suggests that this virus traveled east across the state to a huge army base [Camp Funston, part of Fort Riley], and from there to Europe. Later it began its sweep through North America, through Europe, through South America, through Asia and Africa...The evidence comes from Dr. Loring Miner."

All taken from John M. Barry, The Great Influenza (Penguin Books: 2004, 2005), p.92 et al.