Cheerful or happy
A variant spelling of Hillary, which is derived from the Latin name Hilarius. It historically stems from the word 'hilaris', meaning cheerful or merry. While the 'Hillary' spelling is more common, this version saw a brief uptick in usage in the late 20th century.
Less common today
Hilliary isn't in the latest US Top 1000. It last peaked at #3,417 in 1991.
US births per 5-year period, 1990–present (SSA data).
