Hillis is a unique and distinctive given name of American origin. Derived from the English word 'hill', it signifies elevation, heights, or an upward trajectory. The name Hillis is often associated with nature and its powerful landscapes. It was popularized during the 19th century in the United States but remains relatively uncommon today, adding to its uniqueness.
The name Hillis saw a peak in popularity during the late teens to early twenties, with particularly high numbers of births in 1923 (16 births) and 1918-1919 (both having 14 or more). After 1927, the number of annual births with this name steadily decreased until it reached a low point in the late thirties to mid-fifties, with five years recording only five births each. The total number of births recorded over this period is 408.