Megan (also spelled Meghan, Meagan, Maegan, Megyn, Meaghan, Maeghan, Mehgen) is a Welsh female given name, originally a pet form of Meg or Meggie, which is itself a short form of Margaret. Margaret is from the Greek μαργαρίτης (margaritēs) for "pearl". Megan is one of the most popular Welsh names in Wales and England; it is commonly truncated to Meg. Nowadays, it is generally used as an independent name rather than as a nickname.
Megan was one of the most popular girls' names in the English-speaking world in the 1990s, peaking in 1990 in the United States and 1999 in the United Kingdom. Approximately 54 percent of people named Megan born in the US were born in 1990 or later.