Maghan is of Irish origin, derived from the ancient Gaelic name "Maghnus," which means "strong chief" or "great heart." It was traditionally given to boys and has been used in English-speaking countries since at least the 18th century. The name Maghan is often associated with the legendary High King of Ireland, Niall of the Nine Hostages, who was said to have several sons named Maghnus.
The name Maghan experienced notable fluctuations in popularity between 1975 and 2005. The peak years were 1985 with 39 births and 1987 with 28 births, while the lowest points were 1975 with 7 births and 2005 with just 5 births. Overall, there were a total of 496 babies named Maghan during this period.