Well since Ryuu translates directly to dragon, here are a few last names that would emphasize this name.
Haruki
Pronunciation - Hah-ROO-Kee
Meaning - "Shining brightly"
Therefore - "Brightly shining dragon"
Hide
Pronunciation - HEE-day
Meaning - "Excellent"
Therefore - "Dragon of Excellence" or "Excellent Dragon"
Hoshi
Pronunciation - Hoe-SHE
Meaning - "Star"
Therefore - "Star Dragon"
Kagami
Pronunciation - Kah-GAH-me
Meaning - "Mirror"
Therefore - "Mirror Dragon"
Kana
Pronunciation - KAH-nah
Meaning - "Powerful"
Therefore - "Powerful Dragon"
Keitaro
Pronunciation - KAY-tar-OH
Meaning - "Blessing"
Therefore - "Dragon's Blessing"
Kin
Pronunciation - KIN
Meaning - "Golden"
Therefore - "Golden Dragon"
Toshi
Pronunciation - TOE-she
Meaning - "Mirror Image"
Therefore - "Reflection of the Dragon"
Yamido
Here is a link to a name generating website.
Ryuu means "Dragon Spirit" Tatsuo means "Dragon" and "to be imperial" Kaito means "Dragon", but also "Sea" or "Ocean"
The last name Monton has no meaning in Japanese. But if you're asking how to spell it in Japanese writing, it would be モントン
Japanese will just MALKA as their last name
Pinku-Ryuu. Lol
Nobody in Naruto is called Ryuu. But the main characters name in Ninja Gaiden is Ryu Hayabusa, and in Death Note there is a death god namned Ryu.
japanese!!!
Japanese?
last name
i know there is a Japanese first name with the meaning of tiger and that is Tora
A writer needs to do their own research. Here is a name generator website if you want a couple of ideas to get started.