Mailen is of Scottish origin, derived from the family name 'Maclean'. It means 'descendant of Lean'. In Gaelic, it's rendered as 'Maoilean'. The name gained prominence due to its association with Clan MacLean, a powerful Highland Scottish clan. Mailen has been used as a given name, though it's less common than the more traditional forms like Malcolm or Kenneth.
The name Mailen experienced a significant surge in popularity between 2010 and 2023, with the number of annual births increasing from 17 to 120, indicating a marked rise in its usage. However, there were notable fluctuations throughout these years, including periods of decline such as between 2016 and 2018. Despite these variations, Mailen has shown overall growth in popularity over the past decade and a half, with a total of 612 births recorded between 2007 and 2023.