Jennet is of Scottish origin, derived from the name Janet, which itself comes from the Latin 'Janua', meaning 'door'. It was often used as a pet form of the name Jane in Scotland during the Middle Ages. The name gained prominence through its association with Janet Coombe, a woman burned at the stake for heresy in 1555. Despite this historical figure, Jennet remains a unique and distinctive name, often associated with strength and courage.
"Jennet experienced a peak in popularity during the late 1970s and early 1980s with over 7 births each year from 1970 to 1983. However, it has been relatively uncommon overall, with less than 6 births per year for most decades since the 1920s."