MallowbyNames

Moo

MOO · Most likely derived from the sound a cow makes; not a traditional name.

Peak popularity
2018
Usually for
Girls & boys
Trend
Declining since 2014

Declining since 2014.

Popularity of Moo since 2008

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

471120102020Most births 2013GirlsBoys
GirlsBoys
Data table (by decade)
DecadeGirlsBoys
2000s60
2010s3261
2020s1111

Meaning & origin

Moo is an extremely rare unisex name that first entered U.S. birth records in 2010. It reached its peak popularity in 2018, but since 2014 its use has been falling. The name is essentially a sound, not drawn from any naming tradition, reflecting modern parents' willingness to invent names from everyday sounds. As of 2025, it does not rank among the top 1000 names in any state.

Moo is an onomatopoeic word for the sound made by cattle. It has been used as a nickname or playful given name, particularly in the 2010s, without a long history as a personal name.

Sibling names for Moo

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

Sisters: Baa, Meow, Quack, Oink, Bark

Brothers: Boo, Zoo, Pew, Doo, Woo

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

M is for Moo, our favorite little person.

“M is for Moo…”

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

Make Moo's book

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

Questions parents ask

What does the name Moo mean?
Moo is an English onomatopoeic word for the sound a cow makes; it is not a traditional name with a conventional meaning.
How popular is Moo?
Moo first appeared in U.S. records in 2010 with a peak in 2018, but it remains extremely rare and has never ranked in the top 1000.
Is Moo a boy's name or a girl's name?
Moo is used for both boys and girls, though it is rare for either.