Megan is a Welsh feminine given name, originally a diminutive form of Margaret.
Margaret is from the Greek μαργαρίτης (margarítēs), Latin margarīta, "pearl".
Megan is one of the most popular Welsh-language names for women in Wales and England, and is commonly truncated to Meg.
[1] Megan was one of the most popular feminine names in the English-speaking world in the 1990s, peaking in 1990 in the United States[2] and 1999 in the United Kingdom.
[2] The name is also frequently spelled Meagan, Meaghan, Meghan, or Mehgan outside of Wales and the rest of the United Kingdom due to spelling influence from Irish-language names [4]