A:
There are a great many legends about Saint Peter the apostle.
A substantial part of Acts of the Apostles contains legendary material about St. Peter, including how he led the Christian church after the resurrection of Jesus, and his many miracles. Christians are taught to believe that Acts of The Apostles is true in every detail, but New Testament scholars say that Acts is a book of miracles rather than of history. As for Peter leading the Christian church, Paul's epistles identified Peter as only one of the three senior members ("pillars") of the church in Jerusalem and as the apostle to the Jews. Uta Ranke-Heinemann (Putting Away Childish Things) goes as far as to say that the whole of Acts is a simply a work of Propaganda, not a book of Christian history.
Another legend says that Peter travelled to Rome and led the Church there, appointing Linus to succeed him as bishop of Rome. However, there is no evidence that Peter ever went to Rome. The author of 1 Clement, writing around the end of the first century, appears to have been unaware that Peter ever went to Rome. Even the story of Linus succeeding Peter as bishop of Rome is a legend. Francis A. Sullivan SJ (From Apostles to Bishops) says that there is a general agreement among scholars that the church of Rome was led by a council of presbyters until well into the second century, with no evidence of a ruling bishop.
Peter is the patron saint of many things and places but not the patron saint of any country.
Saint Patrick drove the snakes from Ireland is just a myth since that country has never had snakes.
He had at least one brother - Saint Simon Peter.
There is no record or tradition about any siblings that Saint Peter may have had except for his brother Andrew.
Yes, Saint Peter is really a saint. If he were not a saint he would not have that title.
There is nothing recorded in scripture nor in tradition that mentions any children Peter may have had.
Peter Pevensie does not portray any male patron saint. But, what Peter does portray and is a reference to is this: Peter is a reference and portrays King Arthur and Sir Richard the Lionheart.
Saint Peter's Basilica is larger than Saint Paul's.
Saint Peter was originally a fisherman.
As with the current Saint Peter's Basilica, the old basilica was dedicated to Saint peter the Apostle.
The best known legend says that Saint Patrick drove all the snakes from Ireland when that country never had any snakes to begin with.
Peter Chanel is the patron saint of Oceania only.