Mairin is an Irish feminine given name, derived from the Irish form of the Latin Maria, meaning 'of the sea' or 'rebellious'. It was quite popular in Ireland during the medieval period but has become less common over time. The variant spelling Mairead is more frequently used today.
The name Mairin experienced fluctuating popularity over the past four decades, with a notable peak in 2003 when it reached its highest point at 32 births. However, it has since declined, with only 10 births recorded in 2022 and 18 in 2023. Overall, there were 730 births named Mairin between 1977 and 2023.