MallowbyNames

Mercia

MER-shee-uh · Of uncertain origin; possibly derived from the Old English kingdom of Mercia, or a feminine form of the Latin name Mercius.

Peak popularity
1919
Usually for
Girls
Trend
Holding steady

Holding steady.

Popularity of Mercia since 1918

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

369192019602000Most births 1919Girls
Data table (by decade)
DecadeGirls
1910s15
1920s20
1930s18
1940s18
1950s17
1960s5
1970s5
1980s0
1990s0
2000s11
2010s5
2020s0

Meaning & origin

Mercia is a rare English name with an uncertain etymology, possibly linked to the Anglo-Saxon kingdom of Mercia or derived from a Latin root. Its usage in the United States has been minimal, first appearing in records in 1918 and peaking in 1919 with a small number of births. From 1918 to 2025, the name's trajectory has been stable but extremely low, consistently ranking outside the top 1,000 and never attaining widespread popularity. Top states data show no strong regional concentration, making Mercia a geographically neutral choice. Its obscurity and lack of modern revival suggest it is unlikely to return to fashion, but it retains a historical character for those seeking an antique name with a distinct sound.

Mercia is a name of uncertain origin. It may derive from the Old English kingdom of Mercia, whose name likely comes from the Old English 'mearc' meaning 'boundary' (referring to the borderland between Anglo-Saxon kingdoms). Alternatively, it could be a feminine form of the Latin name Mercius (from Mars, the Roman god of war), though evidence is slim. The name saw limited use in the early 20th century, appearing in U.S. records from 1918 with a small spike in 1919, but never became common.

Nicknames & variants

Nicknames: Mercy, Cia

Sibling names for Mercia

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

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

M is for Mercia, our favorite little girl.

M is for Mercia…”

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

Make Mercia's book

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

Questions parents ask

What does the name Mercia mean?
The meaning of Mercia is uncertain. It may be connected to the Old English kingdom of Mercia (from 'mearc', meaning 'boundary') or be a feminine form of the Latin Mercius, related to Mars.
Is Mercia a popular name?
Mercia is very rare. It first appeared in U.S. records in 1918 with only a handful of births, and its peak year was 1919. It has never ranked among the top 1,000 names and remains uncommon.
Is Mercia a girl's name or a boy's name?
Mercia is used exclusively for girls in historical U.S. data.