"Blend of Jean and Marie"
The name Jeanmarie is commonly a unisex name from the "French" origin.
Jeanmarie is a run-together form of Jean-Marie, a French compound given name built from Jean, the French form of John, and Marie, the French form of Mary. In French usage the hyphenated Jean-Marie is conventionally a masculine name, with Marie as the second element of a male compound. The unhyphenated spelling Jeanmarie appears in United States birth records from 1924 and is recorded there for either sex.
The pronunciation of Jeanmarie is JEEN-muh-ree.