How common is the surname Si?

1,166 people in the United States had the surname Si in the 2010 Census, about 1 in every 264,790 Americans. It ranked 22,158th of 162,253 surnames.

Who is the most famous person named Si?

Fa of Xia, 16th Chinese king of Xia Dynasty, followed by Shaokang.

Where is the surname Si most common?

Wikidata records people named Si in Xia dynasty.

Is the surname Si getting more or less common?

More common. 661 people carried it in the 2000 Census and 1,166 in 2010, up 76%.

Is Si also a first name?

Yes. Si is used as a first name as well as a surname; its first-name page has the meaning and how many babies were given it.

The surname Si

A Chinese surname, carried by 1,166 people in the United States.

Pronounced /saɪ/ 1 syllable Soundex S000

Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Si is more common than 86.3% of them.

Origin

Chinese origin

From clipping of various words beginning with the syllable /saɪ/.

One of 193 Chinese surnames on this site.

Origin from Wiktionary (CC BY-SA 4.0).

How common it is

2010 US Census

There were 1,166 people named Si in the United States in 2010, about 1 in every 264,790 Americans. That is up 76% since 2000, when the Census counted 661.

#22,158

rank among US surnames

1,166

people in 2010

0.4

per 100,000 Americans

+76.4%

change since 2000 (was #32,743)

Who is named Si

Race and Hispanic origin as people reported it in the 2010 Census

85% of people named Si identified as Asian and Pacific Islander, 8.9% as white (not Hispanic) and 3.0% as Black (not Hispanic).

Asian and Pacific Islander 85%
White (not Hispanic) 8.9%
Black (not Hispanic) 3.0%
Hispanic or Latino (any race) 2.1%

The Census suppresses very small shares to protect privacy; Native American, Multiracial are not shown.

Compare: most common surnames among Asian and Pacific Islander Americans.

Famous Sis

2 notable people on Wikidata, most written-about first

Fa of Xia
16th Chinese king of Xia Dynasty
Shaokang
6th king of the Xia dynasty of ancient China, died -2100

Spellings and sound-alikes

Useful when a record has your ancestor under another spelling

Variant spellings

Surnames that sound like Si

Si has the Soundex code S000, the code US census indexes have used since the 1930s. Every surname with code S000.

Other Chinese surnames

All 193 Chinese surnames

Questions

Where does the surname Si come from?: From clipping of various words beginning with the syllable /saɪ/.
How common is the surname Si?: 1,166 people in the United States had the surname Si in the 2010 Census, about 1 in every 264,790 Americans. It ranked 22,158th of 162,253 surnames.
What ethnicity is the surname Si?: In the 2010 Census, 85% of people named Si identified as Asian and Pacific Islander, and 8.9% as white (not Hispanic).
Who is the most famous person named Si?: Fa of Xia, 16th Chinese king of Xia Dynasty, followed by Shaokang.
Where is the surname Si most common?: Wikidata records people named Si in Xia dynasty.
How do you pronounce Si?: Si is /saɪ/, one syllable.
Is the surname Si getting more or less common?: More common. 661 people carried it in the 2000 Census and 1,166 in 2010, up 76%.
What are other spellings of Si?: Sy, Su, Ssu and Szu.
Is Si also a first name?: Yes. Si is used as a first name as well as a surname; its first-name page has the meaning and how many babies were given it.