MallowbyNames

Cathy

KATH-ee · Diminutive of Catherine, derived from Greek Aikaterine, traditionally associated with 'pure'.

2025 rank (girls)
#8,362
Babies named in 2025
12
Peak popularity
1958
2025 frequency
1 in 133,939 girls
Usually for
Girls
Trend
Declining since 1985

Declining since 1985, #8,362 for girls today.

Popularity of Cathy since 1918

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

3.6k7.3k10.9k192019602000Most births 1958Girls
Data table (by decade)
DecadeGirls
1910s13
1920s118
1930s578
1940s15,550
1950s82,719
1960s51,624
1970s12,943
1980s3,662
1990s1,565
2000s916
2010s484
2020s131

Meaning & origin

Cathy emerged as a diminutive of Catherine and gained independent status in the mid-20th century. The name saw its peak popularity in 1958, when it ranked among the most favored names for girls, reflecting the trend of nickname-like given names in the 1950s. Since 1985, however, its usage has declined steadily; as of 2025, it ranks 8362 with a rarity of 1 in every 133,939 girls. The trajectory shows a clear falling pattern, indicative of its association with older generations. While Cathy may not be common among today's newborns, it retains a familiar and friendly feel, often remembered from mid-century culture.

Cathy is a diminutive of Catherine, which itself comes from the Greek Aikaterine. The name's meaning has long been linked to katharos (pure) due to early Christian association with Saint Catherine of Alexandria. Cathy gained independent popularity in the English-speaking world during the 20th century, often used as a given name rather than a nickname.

Where Cathy is most popular

Births per 100,000 girls by state. Press play or drag the slider to watch it move across the decades. The lightest shade means too few recorded births.

2020s
Fewermore per 100k girlstoo few births

Cathy” around the world

Where Cathy lands in the latest official birth statistics abroad, matched to the U.S. spelling.

  • France

    5

    babies in 2024

Sources: INSEE (France).

Nicknames & variants

Nicknames: Cat

Variants: Kathy, Cathie, Katie

Sibling names for Cathy

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

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

C is for Cathy, our favorite little girl.

C is for Cathy…”

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

Make Cathy's book

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

Questions parents ask

What does the name Cathy mean?
Cathy is a diminutive of Catherine, traditionally meaning 'pure' from the Greek katharos, though the exact etymology is debated.
How popular is the name Cathy?
Cathy peaked in popularity in 1958 when it ranked highly for girls. As of 2025, it ranks 8362 with approximately 1 in 133,939 girls given the name.
Is Cathy a boy or girl name?
Cathy is almost exclusively used as a girl's name.