Ko je ona?

A natural pronunciation is roughly:

• Ko = koh
• je = yeh
• ona = OH-nah

So the whole sentence sounds like KOH yeh OH-nah?

A few notes:

• j in Serbian is pronounced like English y in yes
• o is a clear short o, not a diphthong like in some English pronunciations of go
• Stress in ona is usually on the first syllable: OH-na

Ko means who.

It is the standard interrogative word used to ask about a person’s identity:

• Ko je ona? = Who is she?
• Ko je to? = Who is that?

In some contexts you may also see tko, especially in Croatian, but in Serbian ko is the normal form.

Je is the 3rd person singular form of the verb biti (to be) in the present tense.

So:

• ja sam = I am
• ti si = you are
• on / ona / ono je = he / she / it is

That means in Ko je ona?, the word je means is.

In Serbian, Ko je ona? is the normal and natural word order for Who is she?

The pattern is:

• question word + verb + pronoun/noun

So:

• Ko je ona?
• Šta je to?
• Gde je on?

Putting je in second position is very typical in Serbian because je is a clitic. Clitics are short unstressed words that usually go near the beginning of the sentence, often in the second position.

So Ko ona je? sounds unnatural in standard Serbian.

Ona means she.

It is the 3rd person singular feminine pronoun. Compare:

• on = he
• ona = she
• ono = it

So Ko je ona? literally means Who is she?

Not always, but here it is usually included because you are identifying a specific female person.

Serbian often drops subject pronouns when they are clear from the verb form, but with je that is less helpful, because je can mean he/she/it is. The pronoun makes it clear that you are asking about a female person.

Compare:

• Ko je? = Who is it? / Who is he? / Who is she? depending on context
• Ko je ona? = clearly Who is she?

So ona helps specify the person.

Yes, depending on context, it can.

Although ona literally means she, Serbian can use personal pronouns in a slightly broader way when referring to someone visible or already identifiable in context. So if you are pointing at or referring to a woman, Ko je ona? can naturally mean:

• Who is she?
• Who is that woman?

The exact English translation depends on the situation.

It is neutral. Ko je ona? is not especially formal or informal.

It is a basic everyday question. The tone depends more on:

• your intonation
• the situation
• facial expression

For example, it can sound:

• neutral: asking for information
• curious: wanting to know who someone is
• rude or suspicious: if said sharply

So the grammar itself is neutral, but tone matters.

A few simple answers are:

• Ona je Ana. = She is Ana.
• Ona je moja sestra. = She is my sister.
• Ona je profesorka. = She is a teacher / professor.
• To je Marija. = That is Marija.

Notice that Serbian often uses either:

• Ona je ... = She is ... or
• To je ... = That is ...

Both can be natural depending on context.

This is an important distinction.

• Ko je ona? asks who she is — her identity
• Šta je ona? asks what she is — usually her role, job, function, or category

Examples:

• Ko je ona? = Who is she?
• Ona je Jovana. = She is Jovana.

But:

• Šta je ona? = What is she?
• Ona je doktorka. = She is a doctor.

So if you want someone’s identity, use ko, not šta.

Yes. Je is a clitic, which means it is a short unstressed form that normally cannot stand alone with strong stress.

That is why it behaves differently from full words in Serbian word order. It tends to appear early in the sentence, especially in second position.

For learners, the key practical point is:

• say Ko je ona?
• do not try to stress je too strongly
• do not move it freely around the sentence

This clitic behavior is a very common feature of Serbian grammar.