"Variant of Janelle"
The name Janelli is commonly a female name from the "American" origin.
Janelli is a modern American spelling of Janelle, the French feminine form of Jean, with a final -i in place of the -e. The same -elli ending occurs in Italian surnames such as Janelli, but the given name appears in United States birth records only from 1988, which points to a recent respelling rather than an inherited Italian name.
Janelle means "Gracious, merciful. A feminine form of John.".
The pronunciation of Janelli is juh-NEL-ee.