Phonetic transliteration covering names like 'Nasi', 'Nasee', or 'Nazee':
娜 (nà) approximates 'Na-',
西 (xī) approximates '-si/-see'.
娜 is one of the standard 'female-name' characters in Chinese transliteration (cf. Anna
安娜, Nora
诺拉). Note: this is not the Naxi (
纳西) ethnic minority of Yunnan — that uses different characters.