Johannes Caioni (Ion Căian or Căianu in Romanian or Kájoni János in Hungarian; 8 March 1629 – 25 April 1687) was a Transylvanian Franciscan friar and Roman Catholic priest, musician, folklorist, humanist, constructor and repairer of organs of Romanian origin (according to his own testimony, "Natus valachus sum" - "I was born a Vlach").
Caioni was born in Kiskaján (Căianu Mic), in the Principality of Transylvania (now in Bistrița-Năsăud County, Romania). He was raised in Kolozsvár (Cluj-Napoca) and Csíksomlyó (Șumuleu Ciuc). He was of a noble family — Caioni's aunt was the wife of a garrison commander in Csíkszereda (Miercurea Ciuc). Through her connections, he was admitted in the Franciscan monastery of Csíksomlyó (Șumuleu Ciuc).
Caioni studied with the Jesuits in Kolozsvár, and continued his studies in Csíksomlyó. In 1647, he became a friar, and continued his studies in Nagyszombat (Trnava), training in music. He was ordained in 1655. Subsequently, he lived in Csíksomlyó, Gyergyószárhegy (Lăzarea), and Mikháza (now Călugăreni, a village in Eremitu commune, Mureș County). He died in Gyergyószárhegy. (Source:Wikipedia)