Hermenegildo is a distinctive and historic given name of Germanic origin, derived from the elements "haim" meaning home, and "regilaud" which means famous or renowned. This name was popularized during the Middle Ages, particularly in Spain where it was borne by several notable figures, including Hermenegild, a 7th-century Spanish prince who was canonized as a saint after his martyrdom. Despite its rich history, Hermenegildo is not widely used today, making it quite unique and uncommon.
The name Hermenegildo experienced a peak in popularity during the late 60s to early 70s with 8 births recorded in 1967 and 7 births in 1973. However, it has generally been uncommon throughout most of the 20th century, with only 5 or fewer births per year from 1922 to 1998. There was a slight increase in popularity in the late 90s and early 2000s with totals ranging from 5 to 9 births per year.