How to Say “Siwan” in Welsh

By Amy Gabriella • Updated October 7, 2026

Siwan

Siwan is a Welsh female given name.

Siwan is used as a feminine proper noun for a person's name.

Did you know?

Despite its similarity to English names, Siwan follows the unique Welsh system of mutations, meaning the name could change its first letter in certain grammatical contexts.
Because the letter 'w' acts as a vowel in Welsh, the 'w' in Siwan is pronounced like the English word 'oo' or the 'u' in 'ruby'.
The name Siwan is the Welsh equivalent of the English name 'Joan' or 'Jane'.

Examples in context

Mae Siwan yn fy ffrind.
Siwan is my friend.
Wyt ti'n gwybod lle mae Siwan?
Do you know where Siwan is?
Dwedais wrthyf am Siwan.
I told her about Siwan.

Example conversation

Gareth and Catrin are talking about a friend.

Gareth

Obleidiau Siwan?
Have you seen Siwan?
Catrin

Ydy, mae Siwan yn y gegin.
Yes, Siwan is in the kitchen.
Gareth

Da, mae angen Siwan yma.
Good, Siwan is needed here.
Catrin

Fe fyddaf yn galw Siwan.
I will call Siwan.

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About The Author

Amy Gabriella

Hello, I'm Amy. When I'm not penning comprehensive guides on how to speak Welsh, you'll find me exploring the beautiful Brecon Beacons or indulging in a cup of traditional Welsh tea. I’m passionate about Welsh language and culture, from Anglesey to ‘araf’ and Boris Johnson to butterflies. I also enjoy baking – 'cake' is another Welsh word I know all too well! Learning from my posts, you’ll be able to say words ranging from everyday greetings to the names of favourite drinks.

Amy GabriellaHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.

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