こんばんは皆さん、元気でね?
I have a question.
My friend has called her dog the name 祝/岩井(いわい). It's called celebration, a festival or congratulation.
Now is my question... : Is Iwai as a name only write down in Kanji or just hiragana??
Thank you for your help!

どうも!
Greetings,
デイヴィッドハーリー。