The name Onaleigh is of Irish origin and it means "descendant of the champion". It is derived from the Irish surname Ó Nialláin, which was originally a patronymic name meaning "descendant of Niall". The name Niall itself means "champion" or "cloud".
Onaleigh is not a particularly common name, but it has been used by some families in Ireland over the centuries. There are no historical figures known as Onaleigh, but the name has been borne by members of Irish clans and families.
The use of Onaleigh as a given name is quite recent and it is not yet widespread. It may have been adopted due to its unique sound and its Irish heritage. However, there are no records of Onaleigh being used as a given name in Ireland or elsewhere before the late 20th century.
In terms of popularity, Onaleigh has not yet entered the Social Security Administration's list of most popular baby names in the United States. It is still considered quite rare and unique.
"The name Onaleigh has seen a steady increase in usage over the past decade in the United States. According to statistics, there were only 7 babies named Onaleigh born in 2009. However, this number nearly doubled by 2021, with a total of 8 births that year. This indicates that while still relatively uncommon, the name Onaleigh is gaining some traction among parents-to-be in the United States, with a cumulative total of 15 babies named Onaleigh since 2009."