A famous bearer of the name was Publius Aelius Hadrianus, better known as Hadrian, a 2nd-century Roman emperor who built a wall across northern Britain. His family came from the town of Atri in central Italy.
As an English name it can also derive from the month of August, which was named for the Roman emperor Augustus.
As an English name, Alban was occasionally used in the Middle Ages and was revived in the 18th century, though it is now uncommon.
In Britain the parallel form Alice, derived via Old French, has historically been more common than Adelaide, though this form did gain some currency in the 19th century due to the popularity of the German-born wife of King William IV, for whom the city of Adelaide in Australia was named in 1836.