Sadao (さだお)
Sadao is read さだお and has 3 beats. Our data lists 3 spellings: 貞生, 貞男 and 完男. All three are masculine.
Reading
さ·だ·お (3 beats)
Kanji spellings
3 in our data
Gender
Masculine
Source
JMnedict, the open name dictionary
Kanji spellings of Sadao
One sound can be written with different kanji. Each spelling below is a different name on paper.
- 貞生さだおMasculine
Faithful + life
- 貞(さだ)— faithful
- 生(お)— life
- 貞男さだおMasculine
Faithful
- 貞(さだ)— faithful
- 男(お)— name ending
- 完男さだおMasculine
Complete
- 完— complete
- 男— name ending
The kanji in Sadao
What each kanji means on its own, and in how many of the spellings above it appears.
- 貞faithful2 spellings
- 男name ending2 spellings
- 生life1 spelling
- 完complete1 spelling
Sadao with common surnames
Full names with a different spelling and surname on each card. Tap a card for the kanji breakdown.
Names that sound similar
Names that start or end with the same sounds.
Other names that use 貞 (faithful)
Sadao on our lists
Topic pages that include a spelling of this name.
Questions about Sadao
Is Sadao a boy's or a girl's name?
In our data every spelling of Sadao is masculine.
What does Sadao mean?
Sadao is a sound, so the meaning comes from the kanji: 貞生 reads as "faithful + life", 貞男 reads as "faithful" and 完男 reads as "complete". Those come from what each kanji means by itself, and parents may have had a fuller picture in mind.
How many ways can Sadao be written in kanji?
Our data lists 3: 貞生, 貞男 and 完男. Other spellings exist, so ask how a person writes their own name before you write it for them.
How do you pronounce Sadao?
さだお is 3 beats: さ · だ · お. Give every beat the same length and keep vowels short and clear; Japanese has no stressed syllable the way English does.
Where this comes from
The spellings are from our hand-reviewed list of everyday names and from JMnedict, the open Japanese name dictionary. Meanings are built from what each kanji means on its own, so they describe the characters, not what a particular family had in mind.
How we check names · Content last reviewed: 2026-11-08.
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