Leonie is the French and German feminine form of Leon and means "lioness" or "lion", from the Latin leo. It has been a top 20 name in Germany for decades and is pronounced lay-OH-nee there, while English speakers often say LEE-oh-nee. In the United States the name is still rare but at a high: Leonie ranks number 2291 in 2025, its best position so far, up from number 3815 in 2015.