Biatu Piyu IX, Piyu Tunkani, Giovanni Maria Giambattista Pietro Pellegrino Isidoro Mastai Ferretti (latin aru: Pius PP. IX, Italya aru: Papa Pio IX, Kastilla aru: Papa Pío IX, (* Senigallia, 1792 mara 13 uru Llamayu phaxsin yuritayna - † Roma, 1878 mara 7 uru Anata phaxsin yuriwi),  jacha marka sutiyiri jaqi,