Meaning:
Its source is Hilarius, a Latin name meaning "Cheerful."
Alternative Spellings: Hillarie, Hilleary, Hilleri and Hillory
Popularity:
The name Hillary ranked 927th in popularity for females of all ages in a sample of 2000-2003 Social Security Administration statistics and 788th in popularity for females of all ages in a sample of the 1990 US Census.
Though this name has fluctuated in use, it has been quietly present throughout the last century.