Baby Names US
girls' name ★ peaked 1966

Sonji

Gender Girl Rank 2025 Below top lists
Rank 2025
–
among girls
Babies in 2025
<5
named Sonji
How common
–
girls born in 2025
Peak year
1966
225 babies
All-time total
904
#8,046 all-time among girls
First recorded
1951
in Social Security records

Sonji popularity over time

904 babies have been named Sonji since 1951, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure
Births per 1,000 babies of that sex, comparable across eras
0.040.080.110.1518801900192019401960198020002020Peak 1966Girls

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade Girls Per year Change Best rank
1880s – – – –
1890s – – – –
1900s – – – –
1910s – – – –
1920s – – – –
1930s – – – –
1940s – – – –
1950s 29 3 – #4,551
1960s 629 63 +2069% #639
1970s 211 21 -66% #1,794
1980s 29 3 -86% #8,063
1990s 6 1 -79% #12,928
2000s – – – –
2010s – – – –
2020s (to 2025) – – – –

The story of Sonji

Sonji is not currently in use for newborns in the United States: fewer than five babies received the name in 2025. Its story lives in the historical record below.

Since 1951, 904 American babies have been named Sonji. Its peak came in 1966, when 225 newborns received the name, the signature sound of the 1960s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Sonji stood among all girls' names in any year, or use the compare tool to plot it against other names.

How old are people named Sonji?

The median living Sonji is about 58 years old; half are between 55 and 59. An estimated 800 people named Sonji are alive in the United States today.

median 58 020406080100

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Sonji year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year Girls Girls rank
2025 – –
2024 – –
2023 – –
2022 – –
2021 – –
2020 – –
2019 – –
2018 – –
2017 – –
2016 – –
2015 – –
2014 – –
2013 – –
2012 – –
2011 – –
2010 – –
2009 – –
2008 – –
2007 – –
2006 – –
2005 – –
2004 – –
2003 – –
2002 – –
2001 – –
2000 – –
1995 – –
1990 – –
1985 – –
1980 8 #8,063
1975 6 #8,893
1970 39 #2,113
1965 96 #1,074
1960 8 #5,120
1955 5 #6,603
1950 – –
1945 – –
1940 – –
1935 – –
1930 – –
1925 – –
1920 – –
1915 – –
1910 – –
1905 – –
1900 – –
1895 – –
1890 – –
1885 – –
1880 – –

Frequently asked questions

Quick answers about Sonji, drawn from the same Social Security data as the charts above.

How old is the average Sonji?

The median living Sonji is about 58 years old. Half of all living Sonjis are between 55 and 59 years old.

How many people named Sonji are alive today?

An estimated 800 people named Sonji are alive in the United States, based on 904 recorded births and Social Security life tables.

How popular is the name Sonji in 2025?

Sonji did not appear in the 2025 Social Security data, which means fewer than five babies received the name that year.

How many people are named Sonji?

904 babies have been named Sonji in the United States since 1951, based on Social Security card applications.

When was the name Sonji most popular?

Sonji peaked in 1966, when 225 newborns received the name.

Is Sonji a boy or girl name?

Sonji is overwhelmingly a girl's name: 100% of babies with the name.

Is the name Sonji rising or falling?

Sonji has been roughly stable over the past decade.

Names like Sonji

Names that sound and feel close to Sonji: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Sonji with similar names → More names starting with S →