MallowbyNames

Castle

KASS-uhl · From the English word for a large fortified building or group of buildings.

2025 rank (boys)
#5,399
Babies named in 2025
17
Peak popularity
2018
2025 frequency
1 in 100,475 boys
Usually for
Boys
Trend
Holding steady

Holding steady, #5,399 for boys today.

Popularity of Castle since 1916

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

112132192019602000Most births 2018Boys
Data table (by decade)
DecadeBoys
1910s10
1920s7
1930s5
1940s0
1950s0
1960s5
1970s0
1980s0
1990s10
2000s29
2010s197
2020s122

Meaning & origin

Castle is a rare word name that appeared on the U.S. naming record as early as 1916 but has never achieved widespread use. It reached its peak popularity in 2018, though even then it remained very uncommon. As of 2025, Castle ranks 5399 and is given to roughly 1 in every 100,475 boys. The name has been used in the 2010s with a stable trajectory, suggesting occasional but consistent use as a distinctive choice. Like many word names, Castle conveys a sense of strength and history, appealing to parents seeking a name with architectural or medieval connotations. Its rarity ensures it stands out, but it remains a niche option.

Castle is an English word name derived from the Old Norman French 'castel' and Latin 'castellum', meaning 'fort' or 'fortified settlement'. As a given name, it is a rare modern usage, likely inspired by surname usage or the word itself, and has never been common. It saw a slight increase in the 2010s, possibly influenced by popular culture, but remains extremely uncommon.

Sibling names for Castle

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

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

C is for Castle, our favorite little boy.

C is for Castle…”

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

Make Castle's book

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

Questions parents ask

What does the name Castle mean?
Castle is derived from the English word for a fortified building, originally from Latin 'castellum'.
How popular is the name Castle?
Castle is a rare name. In 2025, it ranked 5399 in the United States, with about 1 in every 100,475 boys given the name.
Is Castle a boy's name or a girl's name?
Castle is used primarily for boys, though it can be considered unisex due to its word-name nature.