A variant of Luna, the Latin word for moon.
Lunna is an expanded spelling of Luna, the Latin word for moon and the name of the Roman goddess who personified the lunar body. Luna was worshipped alongside Diana (goddess of the hunt) and Hecate as part of a triple moon goddess—together they represented the moon's three phases: waxing, full, and waning. The name thus carries centuries of mythology, feminine power, and celestial symbolism, all compressed into four letters and their slight elaboration here into five.
K. Rowling's character Luna Lovegood in the Harry Potter series—a dreamy, eccentric, fiercely loyal witch whose name perfectly suited her otherworldly quality. The name also benefits from the broader trend toward celestial and nature names: Stella, Aurora, Celeste, Nova.
Luna entered the top 10 girls' names in the United States by the late 2010s, making it one of the fastest-rising names in modern American naming history. The double-n variant Lunna provides subtle differentiation from the now-common Luna while preserving its lunar lyricism entirely. It evokes Scandinavian orthography—Norwegian and Swedish names frequently feature doubled consonants—giving it a slight Nordic flavor. For a child named Lunna, the name places her in an ancient tradition of moon-reverence while marking her as distinctly her own person within a beloved name family.