Petro Favre (kwa Kifaransa Pierre Favre au Pierre Lefevre; Villaret, Savoie, leo nchini Ufaransa, 13 Aprili 1506 - Roma, Italia, 1 Agosti 1546) alikuwa padri wa kwanza na mwanzilishi mwenza wa Shirika la Yesu pamoja na Ignas wa Loyola na Fransisko Saveri. Alitangazwa na Papa Pius IX kuwa mwenye heri tarehe 5 Septemba 1872, halafu Papa Fransisko alimtangaza mtakatifu tarehe 17 Desemba 2013. Sikukuu yake huadhimishwa tarehe ya kifo chake. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko "It's official: Jesuit Fr. Peter Faber is a saint", National Catholic Reporter, 17 December 2013. Retrieved on 4 October 2014.  Martyrologium Romanum William V. Bangert, To the Other Towns: A Life of Blessed Peter Favre, First Companion of St. Ignatius Loyola (Ignatius Press, 2002) Encyclopædia Britannica, Peter Faber Pope Francis on Peter Faber, August 2013 Giuseppe Boero, The Life of the Blesed Peter Favre of the Society of Jesus, First Companion of St. Ignatius Loyola (London: Burns and Gates, 1873)