Kellis is an uncommon name of Greek origin, derived from the word 'kelli', which means 'mountain'. It's primarily used as a feminine given name but can also be used for males in some cases. The name Kellis has been steadily gaining popularity since the late 20th century and is often associated with individuals who are adventurous or drawn to nature due to its mountain-related etymology.
"Kellis has seen 111 babies named Kellis over the years, with peaks in popularity around 1940 and again in the early 2000s."