Cap'n: with the greatest respect, this song has been knocking aroubnd since a little bit before 1958, under many titles. Including "The Lakes of Pontchartrain" and "The Banks of Pontchartrain". There are three big lakes out there at least, which perhaps explains the confusion? In any case, it is quite irrelevant how many lakes there are in Louisiana The song has names. One of them is "The Lakes of Pontchartrain". That is a fact. Like the nursery rhyme called "The Man in the Moon". As far as I know, at the moment there isn't a man in the moon. That does not affect the fact that its name is "The Man in the Moon".