Things I should have known but only discovered recently:
• The Ionian Islands are not in Ionia. Ionia itself is in western Asia Minor, and includes such cities as Miletus and Ephesus, and the islands of Samos and Chios. But south of the Adriatic Sea (which lies between Italy and Croatia) lies the Ionian Sea, and the islands off the western coast of the Greek mainland are known as the Ionian Islands. There are seven of them, and thus bear the collective name Heptanese (“seven islands”) – probably the most famous of them is Ithaca, home of the legendary Odysseus, although Corfu and Cythera also possess a certain notoriety.
• In a similar way, the Aeolian Islands are not in Aeolia. Aeolia was north of Ionia and includes the island of Lesbos, but the Aeolian Islands are in the Tyrrhenian Sea to the north of Sicily. I suppose that both groups of islands were settled by people from these respective areas in Asia Minor.
• The Mississippi Delta is not the same as the delta of the Mississippi River. From Wikipedia:
The Mississippi Delta, also known as the Yazoo-Mississippi Delta, or simply The Delta, is the distinctive northwest section of the U.S. state of Mississippi (and portions of Arkansas and Louisiana) which lies between the Mississippi and Yazoo Rivers….Despite the name, this region is not part of the delta of the Mississippi River. Rather, it is part of an alluvial plain, created by regular flooding of the Mississippi and Yazoo rivers over thousands of years….The shifting river delta at the mouth of the Mississippi on the Gulf Coast lies some 300 miles south of this area, and is referred to as the Mississippi River Delta. The two should not be confused.