Janmarie is of French origin and means 'grace of God'. It is a combination of the French words 'grâce' meaning grace, and 'Marie', which is derived from the Hebrew name 'Miriam'. The name Janmarie was introduced in the United States during the mid-20th century and gained popularity in the 1950s. In some variations, it may also be spelled as Jan Marie.
"Janmarie had a peak of popularity between 1960 and 1963 with consistently five or more births each year, reaching eight births twice. After 1963, the name's usage decreased, averaging around seven births per year until it dipped back to five in 1984."