Mary took with her to France some noblemen and their children, and amongst them were four girls who served her. Strangely, they were all called 'Mary': Mary Fleming, Mary Seton, Mary Beaton and Mary Livingston.
Sometimes the other girls serving her were called 'Mary' too, even if that wasn't their real name. This was because the word 'Mary' came from the Icelandic word 'Maer' which means 'maid'. People liked the idea of having the Queen served by women called 'mary'.
There's a famous song - nobody knows who wrote it or when - about the Four Marys, and in it the Marys are given different surnames to those listed above, which has caused a lot of debate. Instead of Marys Fleming and Livingston, there are Marys Carmichael and Hamilton. Mary Hamilton sings this song about the four whilst she awaits her execution. The problem is that there is no mention of a Mary Hamilton in the existing historical documents from the time of Queen Mary.
Here are some of the words: