MallowbyNames

Mairin

MAIR-in · of debated origin; possibly a variant of Maire (the Irish form of Mary) meaning 'bitter' or an independent name meaning 'beloved'

2025 rank (girls)
#8,860
Babies named in 2025
11
Peak popularity
2007
2025 frequency
1 in 146,115 girls
Usually for
Girls
Trend
Declining since 2008

Declining since 2008, #8,860 for girls today.

Popularity of Mairin since 1977

Babies named Mairin per year in U.S. Social Security records.

142943198020002020Most births 2007Girls
Data table (by decade)
DecadeGirls
1970s13
1980s94
1990s107
2000s255
2010s197
2020s87

Meaning & origin

Mairin is a distinctly Irish name that entered the U.S. records in 1977 and saw its highest usage in the 2000s, peaking in 2007. Since 2008, its trajectory has been declining, with a 2025 rank of 8860 and a rarity of about 1 in 146,115 births. The name has not registered in any top state lists, reflecting its scattered adoption outside of Irish-American communities. As an authentic Gaelic form, Mairin fits alongside other Irish favorites but remains a less common choice, appealing to parents seeking a name with linguistic roots in the Irish language.

Mairin is the Irish Gaelic form of Maureen, which itself is an Anglicized form of Mairín, a diminutive of Mairéad (Margaret). It has also been used as a modern variant of Maire (Mary). The name has been used in Ireland since the late 20th century, particularly in Irish-speaking communities, and has seen modest adoption in the United States following a peak in the 2000s.

Nicknames & variants

Nicknames: Mair, Rin

Variants: Maureen, Maire, Mary, Mairéad

Sibling names for Mairin

Names that share Mairin's style, for a brother or sister.

A parent animal hugging its little one, the personalized name page

M is for Mairin, our favorite little girl.

M is for Mairin…”

In a Mallowby alphabet book, Mairin's letter becomes Mairin's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Mairin's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Mairin mean?
Mairin is of Irish origin and is often considered a variant of Maire (the Irish form of Mary), meaning 'bitter,' or of Mairéad (Margaret), meaning 'pearl.' Some sources also suggest it may mean 'beloved.' The exact meaning is debated.
How popular is the name Mairin?
Mairin is a rare name in the United States. In 2025, it ranked 8860, with approximately 1 in 146,115 newborns given the name. Its peak popularity was in 2007, and usage has been declining since 2008.
Is Mairin typically a girl's name?
Yes, Mairin is used almost exclusively for girls. It is the Irish feminine diminutive form of Maire or Mairéad.