This is the name of several New Testament characters, most importantly Mary the mother of Jesus. According to the gospels, Jesus was conceived in her by the Holy Spirit while she remained a virgin. This name was also borne by Mary Magdalene, a woman cured of demons by Jesus. She became one of his followers and later witnessed his crucifixion and resurrection.
Due to the Virgin Mary this name has been very popular in the Christian world, though at certain times in some cultures it has been considered too holy for everyday use. In England it has been used since the 12th century, and it has been among the most common feminine names since the 16th century. In the United States in 1880 it was given more than twice as often as the next most popular name for girls (Anna). It remained in the top rank in America until 1946 when it was bumped to second (by Linda). Although it regained the top spot for a few more years in the 1950s it was already falling in usage, and has since dropped out of the top 100 names.
This name has been borne by two queens of England, as well as a queen of Scotland, Mary Queen of Scots. Another notable bearer was Mary Shelley (1797-1851), the author of Frankenstein. A famous fictional character by this name is Mary Poppins from the children's books by P. L. Travers, first published in 1934.
The Latinized form of this name, Maria, is also used in English as well as in several other languages.
This was the name of two ruling queens of Portugal. It was also borne by the Habsburg queen Maria Theresa (1717-1780), whose inheritance of the domains of her father, the Holy Roman emperor Charles VI, began the War of the Austrian Succession.
Though it has never been popular in the English-speaking world among Christians, it has historically been a common name for Jews, who have used it as an Americanized form of names such as Isaac, Israel and Isaiah.
This name got more popular in the early 1980s, then got a boost in 1990 when it was used by the main character in the movie Days of Thunder.