Likely a variant of Lacey, from a Norman place surname meaning "from Lassy."
Lacci is likely a variant of Lacey, ultimately from a Norman place surname meaning from Lassy. That gives it the layered history common to many surname-derived given names: first a place, then a family name, then a personal name with a soft and polished sound.
The compact spelling makes the name look more intimate than the fuller original. Lacci feels delicate and modern, but with old surname DNA underneath. It has the kind of light, graceful quality that has made Lacey and its variants appealing across generations.
The unusual spelling gives it a distinctive edge while preserving the familiar, feminine sound. As a result, Lacci reads as approachable, stylish, and quietly uncommon.