According to the Syrian Orthodox Church, the Patriarch of the Syrian Orthodox Church is a successor of St. Peter, the first Patriarch of Antioch.
"Reliable historians such as Origens (d. 256 AD) Eusebius of Caeserea (d 340 AD), John the Golden Mouth (d. 407 AD), Hieronymus ( d. 420 AD ) and Mar Severius of Antioch (d. 538 AD ) have all commented on St. Peter’s efforts in Antioch, where, as mentioned earlier, he established the Apostolic See. He was the first of its patriarchs to whom the line of succeeding patriarchs is traced. Eusebius of Caeserea25 notes 'In the fourth year after the Ascension of Jesus Christ, St. Peter proclaimed the word of God in Antioch, the great capital, and became its first bishop."26 He also tells us in his Ecclesiastical History, "Ignatius became famous and was chosen to be the Bishop of Antioch and the successor of St. Peter."27 In his Calendar of Feasts, Hieronymus28 fixed the 22nd day of February as the day of the establishment of the See of St. Peter in Antioch. The Catholic Church still celebrates this feast on this same date.29
**We can, therefore, surmise that St. Peter was the first Patriarch of the Apostolic See of Antioch. He had many illustrious successors, including St. Ignatius. This succession has remained unbroken until the time of the present patriarch, the author of this treatise. He is the 122nd in line among the legitimate patriarchs." ** (“The Syrian Orthodox Church of Antioch At A Glance” by H.H. Patriarch Ignatius Zakka I Iwas [bold empahsis mine] sor.cua.edu/Pub/PZakka1/SOCAtAGlance.html )
“The Syriac Orthodox Church is one of the most ancient Christian Churches tracing its roots to the Church of Antioch. The disciples were first called Christians in Antioch (Acts of the Apostles 11:26). Apostle Peter is believed to have established a church in Antioch in AD 37, the remnants of which are still in Antakya (the modern name of Antioch), Turkey. After the martyrdom of Apostle Peter, he was succeeded by St. Euodius and St. Ignatius Noorono as shepherds of the flock in Antioch and in the writings of St. Ignatius we find the evolution of the ecclesiastical order of bishops—ordained successors of the Apostles in whom continued the spiritual authorities vested by our Lord in the Apostles.” ( ‘History of the Syriac Orthodox Church’ [bold emphasis mine] sor.cua.edu/History/index.html )
“Simon Peter the son of John, from the village of Bethsaida in the province of Galilee, brother of Andrew the apostle, and himself chief of the apostles,** after having been bishop of the Church of Antioch ** and having preached to the Dispersion…” (St. Jerome De viris illustribus (On Illustrious Men), Chapter 1. Simon Peter newadvent.org/fathers/2708.htm )
"The first Bishop of Antioch after St. Peter…The “Chronicle of Eusebius” is lost; but in Jerome’s translation of it we find in three successive years the three entries
that Peter, having founded the Church of Antioch, is sent to Rome, where he perseveres as bishop for 25 years"
(‘Evodius’ in ‘The Catholic Encyclopedia,
Online Edition’ newadvent.org/cathen/05653a.htm )
“H.H. Patriarch Mor Ignatios Zakka I Iwas
Patriarch of Antioch and All the East
Supreme Head of the Universal Syriac Orthodox Church” sor.cua.edu/Personage/PZakka1/index.html
It seems that St Peter has at least 2 successors, the Roman Catholic Pope and the Syrian Orthodox Patriarch. Wouldn’t that make the Patriarch of the Syrian Orthodox Church, H.H. Patriarch Ignatius Zakka I Iwas, infallible according to the Catholic belief of Papal infallibility?