Southern vs Southly - What's the difference?

As adjectives the difference between southern and southly

is that southern is of, facing, situated in, or related to the south while southly is obsolete form of southerly.

obsolete form of southerly.

(en adjective)

Of, facing, situated in, or related to the south.

Of or pertaining to a southern region, especially Southern Europe or the southern United States.

* {{quote-magazine, date=2013-06-08, volume=407, issue=8839, page=52, magazine=(The Economist)

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Of a wind: blowing from the south; southerly.

* austral * meridional

* northern * boreal * septentrional

(en adjective)

(en adverb)

(Webster 1913)