"Polly" is a common name for girls, but it also has various synonyms that can be used instead. Some of these synonyms include "Paula", "Paulette", "Pauline", "Pamela", "Pearl", and "Penelope". Each of these names has its unique meaning and background, but they can all be used interchangeably with "Polly" in many settings. It's essential to choose the appropriate synonym depending on the context, tone, and desired effect. For example, "Pearl" may denote a more classic and elegant tone, while "Penelope" may represent a more modern, adventurous feel. Ultimately, the synonym one chooses to use will depend on personal preference and the intended effect.