以南 is read as いなん (inan) and means south of.
いなん
inan
さはらいなんあふりか
Sub-Saharan Africa
いか
including ...
いらい
since
いぜん
before
いご
after this
いじょう
that's all
いがい
with the exception of
もって
adds emphasis to preceding word
いとう
... and eastward
いかどうぶん
same as above
もってのほか
absurd
いかのとおり
as below