* American English: This is probably the most widespread usage of "Nonnie." It's often used in families of Italian, Greek, or other Southern European descent, but it's not restricted to them.
* British English: While not as common as in American English, "Nonnie" is still used in some parts of Britain, especially in families with Italian heritage.
It's important to note that "Nonnie" is a nickname and can vary depending on family tradition and personal preference. It's not a standard term in any official dialect.