Complex sentence: The founders of the Franciscan Friars of the Immaculate and the other branches of this Franciscan family are Fr. Stefano Maria Manelli and Fr. Gabriel Maria Pellettieri, both are from the Conventuals of the First Order of Franciscans.
Split into simpler sentences: The founders of the Franciscan Friars of the Immaculate and the other branches of this Franciscan family are Fr. Stefano Maria Manelli and Fr. Gabriel Maria Pellettieri. Both are originally from the Conventuals of the First Order of Franciscans.