Nikki, a unisex name of Greek origin, is derived from the male name Nicholas. It has gained popularity as an independent given name for both boys and girls since the mid-20th century. The name Nikki is often associated with simplicity and charm, reflecting its casual yet appealing sound. It is composed of only three letters, which gives it a distinctively modern and playful feel. Nikki can be found in various cultures worldwide, with notable figures bearing this name including Nikki Cox, an American actress known for her role in the television series 'Las Vegas', and Nikki Reed, an American actress and screenwriter who gained fame for her role in the Twilight film series.
The name Nikki experienced its peak popularity between the late 1970s and early 1980s, with a significant spike in births occurring in 1984 (30 births) and 1987 (36 births). However, its usage has declined considerably since then, with only 5 or fewer births per year recorded from 2005 onwards.