The surname of Sunny is not readily available as it is not a common surname.
There are a few possible scenarios:
- "Sunny" is a nickname: In this case, the person's actual surname would be different, and we would need more information to identify it.
- "Sunny" is a fictional character: The surname might be specified in the context of the story, book, or movie where the character appears.
- "Sunny" is a brand or company name: This could be a business name, and the surname would not be applicable.
Without further context, we cannot determine the surname of Sunny.