瓦 'wa' +
伦 'lun/len' +
汀 'ting/tin' = 'Va-len-tin'.
瓦 is the standard Chinese character for foreign 'Va-' starts (compare
瓦尔特 Walter,
瓦格纳 Wagner). The English-friendly 'Valentine' is more often rendered
瓦伦丁 (with
丁 ending) —
瓦伦汀 with
汀 is a less common but valid variant; both refer to the same name.