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Si as a Baby Name. Meaning and Origin of Si

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The baby name Si is a Unisex name , 1 syllables long and is pronounced /siː/ (English: "see"); Mandarin examples: sī [si˥], sì [si˥˩] (tone varies by character).

Si is Chinese, English, Irish, Vietnamese, Welsh in Origin.

Gender: Unisex
Syllables: 1.0
Origin: Chinese, English, Irish, Vietnamese, Welsh
Pronunciation: /siː/ (English: "see"); Mandarin examples: sī [si˥], sì [si˥˩] (tone varies by character)

What is the meaning of the name Si ?

The baby name Si is a Unisex name , 1 syllables long and is pronounced /siː/ (English: "see"); Mandarin examples: sī [si˥], sì [si˥˩] (tone varies by character).

Si is Chinese, English, Irish, Vietnamese, Welsh in Origin.

Si is a compact, cross-cultural given name and nickname with several independent origins. In Chinese Pinyin, it transcribes multiple characters whose tones change the meaning: Sī (思 “reflection, thought”), Sī/Si (司 “to manage”), Sī (斯 “this; refined”), and Sì (四 “four”). Vietnamese Sĩ derives from Sino‑Vietnamese 士, denoting a “scholar, gentleman, or soldier.” In Thai and Lao, Si/Sri reflects Sanskrit śrī, “radiance, fortune, auspiciousness,” long used as an honorific element in compound names.

As a standalone or syllabic element, it appears throughout East and Southeast Asian naming for centuries, while in English it functions as a breezy nickname, pronounced “sigh,” for Simon, Silas, Sidney, or Simeon. Notable variants and related forms include Sy, Sze (Cantonese), Sri/Shri, and the Chinese characters 思, 司, 斯, 四. Usage is broadly unisex across Asian contexts; in Vietnamese, Sĩ is typically masculine.

Si has the following similar or variant Names

Si – Popularity by country

Based on birth registration data from national statistics agencies.

Country Gender Year Rank Born of
Ireland Girls 2003 #1 — 735
KH Boys 0 #9 1 270
KR Boys 0 #26 2 897
BN 0 #28 5 2,297
MV Girls 0 #35 1 2,021
ID 0 #38 2 2,238
MO 0 #40 13 2,706
GE 0 #44 1 997
CM 0 #56 1 2,592
LU 0 #66 1 2,830
BN Boys 0 #70 64 6,332
AL 0 #73 4 2,372
AZ Girls 0 #75 1 1,051
AF 0 #76 1 1,883
AO 0 #76 2 2,729
JP 0 #76 2 4,057
MV Boys 0 #76 4 3,375
BG 0 #82 1 1,799
CN 0 #85 2 3,857
LT 0 #87 2 949
AF Girls 0 #92 3 2,402
BN Girls 0 #95 12 5,459
ID Girls 0 #100 3 3,319
TW 0 #100 4 4,523
QA 0 #105 2 7,011
PH 0 #108 3 5,607
OM 0 #118 4 6,215
KW 0 #121 1 5,216
ID Boys 0 #122 10 4,130
MO Girls 0 #124 137 7,056
EE Boys 0 #125 1 2,087
IQ 0 #131 3 3,533
GR 0 #135 1 3,911
EE Girls 0 #140 3 1,888
LT Boys 0 #148 4 2,166
BW Girls 0 #150 2 4,216
BW Boys 0 #153 2 4,685
RS Boys 0 #154 1 2,277
BD Boys 0 #164 819 10,045
MO Boys 0 #164 60 5,842
BD 0 #170 58 5,992
HU Boys 0 #172 3 3,954
LT Girls 0 #173 22 1,904
HR 0 #181 1 2,081
CZ 0 #183 4 3,154
AE 0 #184 4 10,220
LU Girls 0 #186 5 4,850
TN 0 #187 2,719 13,765
DZ 0 #189 4,369 20,130
RU 0 #194 1 3,641
Austria 0 #198 16 850
MA 0 #201 5,949 20,986
DK 0 #206 1 5,198
AL Girls 0 #209 14 4,141
SI Boys 0 #211 1 3,402
PL 0 #212 1 2,600
AO Girls 0 #217 1 4,575
HU Girls 0 #224 2 3,308
TW Boys 0 #225 17 7,111
BG Girls 0 #227 5 3,559
IR 0 #227 5 4,221
NA Girls 0 #234 4 7,146
JP Girls 0 #236 10 6,592
SG 0 #238 32 11,010
MY 0 #241 90 12,352
AO Boys 0 #243 7 5,568
EC Boys 0 #246 1 3,322
GH 0 #247 2 5,396
PT 0 #247 4 4,161
TW Girls 0 #248 29 8,139
NA Boys 0 #250 4 6,830
AF Boys 0 #268 7 3,535
NG 0 #270 3 5,926
JM Girls 0 #276 3 7,507
IL 0 #281 2 6,291
CN Girls 0 #283 67 8,829
SA 0 #284 12 10,560
AL Boys 0 #285 14 5,122
CN Boys 0 #288 32 9,639
HR Girls 0 #293 2 3,687
KZ Boys 0 #296 1 6,578
QA Girls 0 #297 20 15,378
CZ Boys 0 #298 8 6,530
JP Boys 0 #298 6 7,909
Canada Girls 2015 #308 5 2,822
Canada Boys 2014 #323 9 2,348
DK Girls 0 #325 5 7,429
CZ Girls 0 #327 15 5,378
KZ Girls 0 #327 6 5,862
SG Girls 0 #327 279 18,916
DK Boys 0 #328 5 7,401
Germany 0 #331 109 2,542
OM Girls 0 #333 64 15,987
PL Boys 0 #333 8 6,459
HK 0 #334 15 8,483
BR 0 #335 11 5,969
GH Girls 0 #335 3 6,973
BD Girls 0 #337 50 8,413
Austria Girls 0 #338 83 1,885
GT 0 #338 1 5,948
JO Girls 0 #339 1 7,570
MU Girls 0 #342 10 8,539
MU Boys 0 #343 15 8,477
SD Girls 0 #351 8 7,678
GH Boys 0 #357 5 8,138
PL Girls 0 #357 8 5,096
PH Boys 0 #364 20 11,440
PT Boys 0 #376 6 7,951
PH Girls 0 #380 11 13,098
EG 0 #387 14 6,387
JO Boys 0 #388 2 7,057
YE 0 #392 7 8,639
Germany Girls 0 #396 607 4,949
MY Boys 0 #396 1,086 25,439
France Boys 2016 #406 3 2,872
BO 0 #407 2 6,868
UY Boys 0 #409 5 5,922
IR Boys 0 #423 133 10,162
PT Girls 0 #423 29 7,952
Austria Boys 0 #426 17 2,180
SD Boys 0 #428 18 10,523
CL 0 #432 3 6,867
IQ Girls 0 #436 69 11,303
SG Boys 0 #439 266 17,960
MX 0 #442 4 8,339
AR Boys 0 #457 11 7,628
RU Girls 0 #458 41 11,913
HK Boys 0 #460 68 12,905
IR Girls 0 #464 67 8,334
ZA 0 #468 7 14,421
HK Girls 0 #471 145 16,104
MY Girls 0 #477 633 24,821
BH 0 #490 64 17,937
KW Girls 0 #491 25 19,177
RU Boys 0 #492 14 12,621
GT Boys 0 #497 3 7,625
PS Girls 0 #501 23 10,981
PA Boys 0 #503 3 9,305
CO 0 #504 7 7,768
CR Boys 0 #505 6 10,188
AE Girls 0 #509 45 20,968
PA Girls 0 #515 4 9,861
LY 0 #516 20 12,703
CM Girls 0 #531 10 11,671
UY Girls 0 #531 6 6,731
GT Girls 0 #538 4 7,500
PS Boys 0 #538 11 10,655
IL Girls 0 #568 50 11,648
CM Boys 0 #569 7 12,054
CR Girls 0 #569 5 11,342
BO Boys 0 #580 13 9,244
AR Girls 0 #581 19 8,289
QA Boys 0 #593 115 18,093
IL Boys 0 #596 12 10,983
EG Boys 0 #603 302 15,035
IN Girls 0 #604 28 13,121
IQ Boys 0 #612 56 13,071
LB 0 #634 25 13,263
OM Boys 0 #639 248 17,948
CL Boys 0 #642 24 13,390
BO Girls 0 #644 8 9,488
IT 0 #652 63 4,183
Finland Boys 2026 #676 7 3,552
KW Boys 0 #684 86 18,755
Finland Girls 2026 #734 5 3,895
BR Boys 0 #740 12 12,213
SA Girls 0 #752 184 25,931
SY 0 #759 9 11,684
NG Girls 0 #770 17 15,093
BR Girls 0 #807 135 12,708
Germany Boys 0 #825 128 5,697
CL Girls 0 #836 16 14,098
EG Girls 0 #837 123 14,742
PE Boys 0 #859 20 14,506
CO Boys 0 #869 52 15,656
Spain Boys 0 #871 60 5,610
NL Girls 0 #873 83 5,933
United States Boys 2017 #880 6 7,410
NL Boys 0 #889 63 5,873
United States Girls 2011 #917 8 9,736
NG Boys 0 #918 34 16,906
PE Girls 0 #923 21 14,861
Spain Girls 0 #924 60 5,561
MX Boys 0 #930 53 16,355
IN Boys 0 #931 71 16,750
AE Boys 0 #959 134 22,615
CO Girls 0 #1,039 40 16,140
ZA Boys 0 #1,066 113 25,619
ZA Girls 0 #1,070 72 25,928
TR 0 #1,092 120 19,440
IT Boys 0 #1,118 356 10,046
IT Girls 0 #1,133 317 9,415
MX Girls 0 #1,160 24 17,781
SA Boys 0 #1,161 481 28,008

Si is popular in 85 countries — most recent births per country:

France
United States
Canada
Ireland
AE

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People also ask about Si

Si is a unisex name, given to both boys and girls.
Si is a one syllable name, pronounced /siː/ (English: "see"); Mandarin examples: sī [si˥], sì [si˥˩] (tone varies by character).
Common nicknames and spelling variations include Simon, Simone, Siân, Síle, Sìne (Sìne / Sine) and Siobhán.
Across languages, Si has these equivalents: Shimon (Hebrew), Jane (equivalent for Welsh Siân), Cecilia (equivalent for Síle).
Yes, very popular — Si ranked #1 in Ireland in 2003, and appears in official birth registries across 6 countries.
Si ranks highest in Ireland (#1 in 2003).