The name Jennie is an English variant of the name Jennifer, which has its origins in the Welsh language. The name Jennifer is a compound word derived from the Welsh elements "gwen" meaning fair or white, and "fferen" meaning smooth or smooth-browed.

In the 16th century, the name Jennifer made its first recorded appearance in the poetry of the Welsh writer Siôn Phylip. The name Jennie, as a diminutive form of Jennifer, emerged in the late 18th century and grew in popularity in the following centuries.

One of the earliest recorded instances of the name Jennie can be found in the works of Scottish novelist Sir Walter Scott. In his novel "The Heart of Midlothian," published in 1818, Scott introduced a character named Jeanie Deans, which helped popularize the spelling variation Jennie.

Throughout history, several notable figures have borne the name Jennie. One of the most famous was Jennie Churchill (1854-1921), the mother of British Prime Minister Winston Churchill. Another prominent Jennie was Jennie Jerome (1854-1921), an American socialite who married Lord Randolph Churchill and was the mother of Winston Churchill.

In the realm of literature, Jennie Grahame (1837-1887) was a Scottish novelist and author of children's books, including the classic "The Wind in the Willows." Jennie Lee (1904-1988) was a British politician and cabinet minister, known for her work in promoting the arts and founding the Open University.

Jennie Baxter (1798-1873) was an American pioneer and diarist who documented her journey along the Oregon Trail in the mid-19th century. Her diary, published as "Jennie Baxter's Journal," provides a valuable account of the experiences of early settlers in the American West.

These are just a few examples of notable individuals who have carried the name Jennie throughout history, reflecting its enduring popularity and cultural significance.