Louis Hall Nelson (September 17, 1902 – April 5, 1990) was a New Orleans jazz trombonist. Louis Nelson was born on September 17, 1902 at 1419-21 Touro Street in New Orleans, Louisiana. His father, Dr. George Harry Nelson, was a medical doctor. Dr. Nelson helped organize the 9th Louisiana Volunteers and served in the Spanish–American War. He was commissioned as first lieutenant. During the war he served in Cuba and also stormed San Juan Hill. His mother, Anna Hattie Adams Nelson, was a teacher and pianist from Springfield, Massachusetts. She was a descendant of runaway slaves from the Eastern Shore of Maryland. She was a graduate of the Boston Conservatory of Music. His mother moved to Louisiana to teach and this is where she met her husband. They had three children: Mary Nelson Welch, Geor