To spell your name in Japanese, you would use the katakana syllabary. You basically just find syllables that sound close to the syllables in your name.
For example
Adam = A da mu (アダム)
カイラ。
is that a name
ガゲ
The name 'Abbey' in Japanese is??? (abii).
The name Vincent can be written 'binsento,' in Japanese: ビンセント
The name 'Massimo' in Japanese is マッシモ (masshimo).
The name Lindsey becomes リンジー (rinjii) in Japanese.
you can not spell random letters in Japanese
Sienna = シエナ
Marusu or マルス
That would be Makusu.
ホリー /ho rii/ is the Japanese term for the name 'Holly'.