Results for Leo Festetics (not all results may be relevant):
Spanisches Stänchen (composed in 1846, and later transcribed for solo piano by Ferenc Liszt [Liszt catalogue entry S487])
Variations on Pásztor Lakodalmas (composed in 1858 and *also* transcribed for solo piano by F. Liszt)
other works in a more-or-less nationalist vein
Not much biographical information Leó Festetics is available.
He was a count and titled as Gróf Festetics Leo [N.B. in Hungary, as with Korea, the citizen presents himself by giving his surname *first* followed by his given name: hence, Bartók Béla.]
He was instrumental in helping the young Liszt become more noticed as a performer (and to some degree as a composer).
More information about Gróf Festetics can be obtained through the links given below.
Alexander Kubinyi <firstname.lastname@example.org> writes: Count Leó Festetics was married twice. His first wife was Baroness Borbala (Barbara) Kray and his second wife was Countess Krisztina Kubinyi, one of my ancestors. Leó and Krisztina were married on 23 September, 1867 and they stayed together for 17 years until the death of Leó on 15 November, 1884. They had one daughter, the Countess Leontina Festetics.