Southern Syria is the southern part of the Syria region, roughly corresponding to the Southern Levant. Typically it refers chronologically and geographically to the southern part of Ottoman Syria provinces.
Syria in the Ottoman Cedid Atlas of 1803. The yellow area, corresponding to the Levant. The medium sized bold text says “برشام” (“Sham” or Syria) and "ارض فلاستان" ("Land of Palestine") in the middle and on the bottom left respectively
The Southern Levant is a geographical region encompassing the southern half of the Levant. It corresponds approximately to modern-day Israel, Palestine, and Jordan; some definitions also include southern Lebanon, southern Syria and/or the Sinai Peninsula. As a strictly geographical description, it is sometimes used by archaeologists and historians to avoid the religious and political connotations of other names for the area.
Satellite imagery of the Southern Levant