Milliard is of French origin, derived from the given name Millionnaire, which was used to denote someone who owned a lot of property or land. It is composed of two elements: 'million' meaning one thousand and 'aire' referring to land or estate. Thus, Milliard can be interpreted as 'one with vast estates.' The name first appeared in France during the Middle Ages but has since gained global recognition.
The name Milliard was quite popular between the years 1914 and 1927, with a total of 43 babies named Milliard during this period. However, it seems to have been more common among boys born in 1917, as that year saw the highest number of births with that name, at nine.