Peter1 male forename; the name given to the Apostle originally called Simon. Peter (‘stone’) is the name given him by Jesus, signifying the rock on which he would establish his Church, although he also fulfilled Jesus's prophecy that ‘before the cock crow twice, thou shalt deny me thrice’ (Mark 14:30).

St Peter is regarded by Roman Catholics as the first bishop of the Church at Rome, where he is said to have been martyred in about ad 67, traditionally by being crucified upside down. He is often represented as the keeper of the door of heaven, and his emblem is a pair of keys. His feast day is 29 June.
Peter's pence an annual tax of one penny from every householder having land of a certain value, paid to the papal see at Rome from Anglo-Saxon times until discontinued in 1534 after Henry VIII's break with Rome. In the Roman Catholic Church, it is a name given to the collection taken in churches on the feast of St Peter and St Paul.
St Peter ad Vincula a church dedication meaning ‘St Peter in chains’, the reference is to the story in Acts 12, which tells of Peter's imprisonment ‘bound with two chains’, and of how he was miraculously released from his chains by an angel.
St Peter's fish any of several fishes having a mark on each side of the body, alluding to the touch of St Peter's thumb and finger when he caught the fish whose mouth contained the tribute-money (Matthew 17:27).
St Peter's keys the cross keys (one gold and one silver, representing the power to bind and loose) borne in the papal coat of arms.