I like the word dixieland... It sounds like some theme park or enchanted place far far away. Unfortunately, it's neither- instead, it's a type of jazz music, said to have started in New Orleans in the early 20th century. It then spread to Chicago and New York City.
Dixieland music uses elements of French quadrilles, ragtime and blues played over a rhythm section, generally comprising of 'standard' instruments such as piano, guitar etc. Polyphonic improvisation is also used, largely with trumpets, trombones or clarinets. Typically, the music sounds chaotic but linked; a feeling created by a main melody surrounded by improvisation. Dixieland is often referred to as 'traditional jazz'- some people feel the original name has racial overtones when a feature of the music is that it breaks boundaries allowing harmony in nationality, race, religion and ethnicity.
Louis Armstrong was a trumpeter and singer often connected to dixieland, though he had strong links to other genres. He lead a band associated with dixieland called the All Stars, which had many other members over the course of it's existence.
The Dukes of Dixieland was a revival band, formed in 1948, when a lot of dixieland music had died away. It was started by the Assunto family (two brothers and their father), though it disbanded in the early 1970s when the brothers died. A group has since been started up called Dukes Place, which is still around today.
Someday You'll Be Sorry- Louis Armstrong And His All Stars
When The Saints Go Marching In- The Dukes Of Dixieland