import bpy


def get_property_name(data, property) -> str:
    ''' Get the name of a property.

    data (AnyType) - Data from which to take property.
    property (str) - Identifier of property in data.
    return (str) - The name of the property.
    '''
    return data.rna_type.properties[property].name if hasattr(data, property) else ''


name = get_property_name(bpy.context.object.rigid_body, 'friction')

print(name)