Prior to 1917, one of Covington's busiest streets was Louisiana Avenue, a broad dirt road lined with beautiful oaks. It led from the downtown area southward towards St. Paul's and turned westward to connect up with the bridge over the Tchefuncte River that led down to Madisonville. Here's a postcard showing the thoroughfare.
Within a year, the Madisonville Road and Louisiana Avenue were greatly improved. The city of Covington , in order to show its gratitude, renamed Louisiana Avenue "Jahncke Avenue" in honor of Walter Jahncke's family who operated the shipyard and the associated navigation company that did the shell dredging.
Interestingly, a four block segment of Louisiana Avenue remains today, along the same alignment as most of Jahncke Avenue, but south of where Jahncke veers to the west and moves a block over. The current day Louisiana Avenue runs between 12th Avenue and 8th Avenue.
Jefferson Street, in Old Covington, which at that time ran from America Street to Jefferson Avenue, was to be changed to Jefferson Davis Street.
Madison Street, which at that time was a continuation of Theard Avenue, was to be changed to Theard Avenue from its intersection with Columbia Street all the way to Hancock Street. (19th Avenue?)
Monroe Street and its continuation known as Independence Street in the Division of St. John, stretching from the Bogue Falaya River at the foot of Columbia Street, to Seventh Avenue beyond River Glen park, was to be changed to Wharton Street, in honor of the founder of Covington.
Washington Street, in Old Covington, which at that time ran from the Bogue Falaya River to Jefferson Avenue, was changed to Lafayette Street.
And Jackson Street, in the Division of Spring, which at that time ran from New Hampshire to River Glen Park, was changed to Louisiana Street.
That's not all of the story, however. To further complicate the matter, there's another Louisiana Avenue just west of Covington, located between Pruden Road and the Tchefuncte River, that starts at U.S. 190 and heads north.