MallowbyNames

Isao

ee-SAH-oh · Of uncertain meaning, possibly 'merit' or 'worth' from Japanese 功 (isao).

Peak popularity
1917
Usually for
Boys
Trend
Holding steady

Holding steady.

Popularity of Isao since 1915

Babies named Isao per year in U.S. Social Security records. Raw births topped out in 1925, but relative to how few babies were recorded back then, Isao's real moment was 1917.

71320192019602000Most births 1925Boys
Data table (by decade)
DecadeBoys
1910s70
1920s128
1930s38
1940s5
1950s0
1960s0
1970s0
1980s0
1990s0
2000s0
2010s5
2020s0

Meaning & origin

Isao is a Japanese name with uncertain but honorable roots. It has been in occasional use in the United States since at least 1915, with its peak recorded year being 1917. After a peak in the late 1910s, its use remained stable but rare. The name has never appeared in the top 1000 names and its one-in-N statistic was not recorded for recent years. The name is primarily associated with Japanese heritage and culture.

Isao is a Japanese given name. It is often written with the kanji 功 meaning 'merit, achievement' or 勲 meaning 'meritorious deed'. The name dates to at least the early 20th century in Japan, with recorded use in the United States beginning in 1915.

Isao” around the world

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

  • France

    120

    babies in 2024

Sources: INSEE (France).

Sibling names for Isao

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

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

I is for Isao, our favorite little boy.

I is for Isao…”

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

Make Isao's book

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

Questions parents ask

What does the name Isao mean?
The meaning of Isao is uncertain but is often associated with the Japanese kanji 功 (isao) meaning 'merit' or 'achievement'.
How popular is the name Isao?
Isao is a rare name in the United States. It peaked in popularity in 1917 but has not ranked in the top 1000 since.
Is Isao a boy's name or a girl's name?
Isao is predominantly a masculine name.