Janenne is of Hebrew origin, derived from the name Johanne, meaning 'God is gracious'. It's a variant spelling of Jane, which was brought to England by French Normans after the Norman Conquest in 1066. Traditionally, Janenne has been more common in France and some European countries, but it has also made appearances in other parts of the world.
"Janenne saw 7 babies named her in 1960 and another 5 in 1974, making a total of 12 Janennes over those two years."