Heter det Southern Norway eller southern Norway?

[Neket]

Jeg fant dette også:

Sitat:

North, East, South and West in Proper Nouns

The directions north, east, south and west should not be given capital letters unless they form part of a name like 'West Ham', 'West Sussex' and 'South Africa'. (Names of places are classified as proper nouns.) The geographical areas 'The North', 'The East', 'The South' and 'The West' should also have capital letters.

Så egentlig blir det jo et definisjonsspørsmål når det gjelder Southern Norway, men south of Norway blir med liten s.