Translation help.

[636R]

Hello

I'm sorry if this is in the wrong section of the forum.
OK I need some help if possible.
ルーカス＆柳 So the first one I wanted the name Lukas the second Willow.
Rūkasu & Yanagi is all I can get. Does anyone know if I can get a closer likeness to the names in Japanese?

Thanks for any help you can give..