If St. Peter was Pope9 who was his successor?

The Catholic Answers

St. Irenaeus, writing in the second century, gives us the list of the Popes from St. Peter as follows:—Linus, Cletus, Clement, Anacletus, Evaristus, Alexander, Xystus, Telesphorus, Hyginus, Pius, Anicetus, Soter, Eleutherius. Eleutherius was reigning as Pope in the time of Irenaeus.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty