What is "marsalis"

Marsalis is the surname of an American family of jazz musicians including (from eldest to youngest):

• Ellis Marsalis, Sr., father of Ellis Marsalis, Jr.
• Ellis Marsalis, Jr., pianist; father of the others listed here
• Branford Marsalis, saxophonist & clarinettist
  • Marsalis Music, a record label founded by Branford Marsalis
• Wynton Marsalis, trumpet and cornet player
• Delfeayo Marsalis, trombone player and producer
• Jason Marsalis, drummer and percussionist