戴安妮 renders the English name 'Diane' / 'Dianne' (three syllables in Chinese: Di-an-ni). Princess Diana is more commonly
戴安娜, so
戴安妮 specifically signals 'Diane' or 'Dianne' rather than 'Diana' - the final
妮 (nī, 'girl') is a feminine character often used for foreign female names.