Hallis is of American origin, derived from English surnames like Halifax and Holland. It means 'from the holly valley' or 'from the land of Holand'. This unique first name gained popularity in the United States during the late 20th century.
The name Hallis experienced fluctuating popularity between 1919 and 1935, with a total of 67 births recorded over the period. The years with the highest number of births were 1921 and 1928, both recording 8 births each. There was a notable gap in births from 1924 to 1925, and again from 1927 to 1928.