The name Leanne is a feminine given name of French origin, derived from the French form of the Germanic name Lena or Liena. It is believed to have emerged in the Middle Ages, around the 12th or 13th century.

The name Leanne is thought to be a combination of two Old German elements: "lind" meaning "soft, tender, or mild," and "gard" meaning "protecting or shielding." This suggests that the original meaning of the name was likely "one who is gentle and protective."

While the name does not appear to have any direct references in ancient texts or religious scriptures, it is possible that its Germanic roots may have been influenced by early Christian traditions or values associated with gentleness and protection.

One of the earliest recorded instances of the name Leanne can be found in the records of the French region of Normandy in the 13th century. However, it was not until the 16th and 17th centuries that the name gained popularity across Europe.

Throughout history, several notable individuals have borne the name Leanne. One of the earliest was Leanne de Boulogne (c. 1200-1260), a French noblewoman and countess of Boulogne. Another was Leanne de Gougy (c. 1400-1472), a French poet and courtier during the reign of King Charles VII.

In the 18th century, Leanne Lefebvre (1755-1835) was a French revolutionary who played a significant role in the events leading up to the French Revolution. In the 19th century, Leanne de Villeneuve (1811-1867) was a French novelist and playwright known for her romantic works.

More recently, Leanne Payne (1940-2015) was an American singer and songwriter who achieved success in the 1960s and 1970s with her folk-rock style. She is remembered for her hit songs "Little Arrows" and "Reason to Believe."