What is the ruling on naming a girl "Lady"? And may Allah reward you with good.

The name "Lady" is foreign. The ruling on naming with it depends on knowing its meaning: If it is good and does not contradict Islamic law, then it is permissible. If it is ugly or contradicts Islamic law, then it is not permissible. If its meaning is unknown, it is better to avoid it. Good and well-known names are recommended.