Recently in Umatilla, Florida I tried to figure out where they came up with that name. I asked three different people, who had no idea. They all looked at me like I had lost my mind for asking. Anyway, my son came up with this theory - Two rednecks are talking to each other, one says, "What the heck's the name of that thing that you steer your boat with?" The other redneck replies, "UMMM- a tiller???" Hence they named the town.
I guess I could Google the name, but I am scared homeland security will knock on my door.