First Name
in the U.S.
since 1880
Last Name
in the U.S.
in 2010
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How to Pronounce Sei

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Meaning and Origin

What does the name Sei mean? Find out below.

Origin and Meaning of Sei

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  1. sei whale

sei was also found in the following language(s): Basque, Corsican, Fala, Finnish, Galician, German, German Low German, Gothic, Italian, Japanese, Lojban, Norwegian Bokmål, Norwegian Nynorsk, Pennsylvania German, Portuguese, Scots, and Sicilian

Notable Persons Named Sei

Sei Shōnagon is a lady-in-waiting to empress teishi and lady-in-waiting. Sei was given the name Kiyohara Nagiko .


Sei was given the name Igarashi Aya on November 22nd, 1983 in Fukushima, Fukushima.


Sei was born on January 16th, 1905. They left this life on November 15th, 1969.


Sei Muroya is a soccer player for the F.C. Tokyo. Sei was born on April 5th, 1994 in Kumatori, Osaka.



Sei Hatsuno is a mystery fiction and thriller (genre) author. He was most prominent from 2002 to present. Sei was born in Shimizu city, Shizuoka, Japan.


Notable Persons With the Last Name Sei

Their most notable accomplishments were from 1802 to 1803. Shō was born as the child of Shō On on December 4th, 1800. They died on February 7th, 1803.


Indrek Sei is a swimmer. Indrek was born on July 26th, 1972 in Tallinn.


Where is the name Sei popular?

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Popularity of Sei as a last name

The map shows the absolute popularity of the name Sei as a last name in each of the states. See other popular names in California, New York, or Michigan.

Ethnicity Distribution

Ethnicity Sei U.S.
  White 40.22% 64.26%
  African American 11.81% 11.96%
  Asian, Hawaiian, and Pacific Islander 37.27% 4.85%
  American Indian and Alaska Native 0.00% 0.69%
  Two or More Ethnicities 4.43% 1.76%
  Hispanic or Latino 6.27% 16.26%

Of Last Name Sei

People with the last name Sei are most frequently White, African American, or Asian, Hawaiian, and Pacific Islander

Entire United States

Fun Facts about the name Sei

  • How Popular is the name Sei? Sei is the 77,647th most popular name of all time. As a last name Sei was the 71,886th most popular name in 2010.
  • How many people with the first name Sei have been born in the United States? From 1880 to 2017, the Social Security Administration has recorded 7 babies born with the first name Sei in the United States.
  • What year were 5 or more babies first named Sei? The name was first given to 5 or more babies in the year 2007 when it was given as a first name to 7 new born babies.
  • When was Sei first recorded in the United States? The oldest recorded birth by the Social Security Administration for the first name Sei is Sunday, December 2nd, 1877.
  • What year had the most people named Sei born? The highest recorded use of the first name Sei was in 2007 with a total of 7 babies.
  • Weird things about the name Sei: Your name in reverse order is Ies. A random rearrangement of the letters in your name (anagram) will give Eis. How do you pronounce that?
  • How many people have the last name Sei? In 2010, the U.S. Census Bureau surveyed 271 people with the last name Sei.
  • How likely are you to meet someone with the last name of Sei? Chances are, most people haven't met someone with Sei as their last name since less than 1 person in 1.1m people have that last name. If you know one, consider yourself lucky!

What Seis Have Visited This Page?

Name poster for Sei

Name poster for Sei(click to save the high quality version)

Most Popular Names

All Name Lists

  • Sources:
  • U.S. Census Bureau: Frequently Occurring Surnames from the Census 2000 (public domain).
  • U.S. Social Security Administration: Popular Baby Names, Death Master File (public domain).
  • Wiktionary: Titles and License.
  • Notable persons via Wikipedia: Titles and License. Click each image for the attribution information.