Due to the renown of the apostle, this name became common throughout the Christian world (in various spellings). In England the Normans introduced it in the Old French form Piers, which was gradually replaced by the spelling Peter starting in the 15th century [1].
Besides the apostle, other saints by this name include the 11th-century reformer Saint Peter Damian and the 13th-century preacher Saint Peter Martyr. It was also borne by rulers of Aragon, Portugal, and Russia, including the Russian tsar Peter the Great (1672-1725), who defeated Sweden in the Great Northern War. Famous fictional bearers include Peter Rabbit from Beatrix Potter's children's books, Peter Pan, the boy who refused to grow up in J. M. Barrie's 1904 play, and Peter Parker, the real name of the comic book superhero Spider-Man.
In England the name was used by the Normans and became very popular due to Saint Thomas Becket, a 12th-century archbishop of Canterbury and martyr. It was reliably among the top five most common English names for boys from the 13th to the 19th century, and it has remained consistently popular to this day.
Another notable saint by this name was the 13th-century Italian philosopher and theologian Thomas Aquinas, who is regarded as a Doctor of the Church. Other famous bearers include philosopher Thomas Hobbes (1588-1679), American president Thomas Jefferson (1743-1826), novelist Thomas Hardy (1840-1928), and inventor Thomas Edison (1847-1931).