The name Alannah has its origins in the Gaelic language, traced back to Ireland and Scotland. It is derived from the ancient Irish name Ailinn, meaning "beautiful" or "fair." The name's earliest recorded use dates back to the 7th century AD, when it appeared in Irish texts and historical records.

The name Alannah gained popularity during the Middle Ages, particularly among the Irish and Scottish nobility. One of the earliest recorded bearers of the name was Alannah of Fife, a Scottish noblewoman who lived in the 13th century. She was renowned for her beauty and her role in negotiating peace between warring clans.

Another notable figure was Alannah O'Donnell, an Irish chieftain's daughter from the 15th century. She was known for her bravery and leadership during a time of conflict, leading her clan's forces into battle against invading armies.

In the 16th century, the name appeared in English literature, with the character of Alannah in Edmund Spenser's epic poem "The Faerie Queene." This literary reference helped to spread the name's popularity beyond Ireland and Scotland.

During the 18th century, Alannah MacLean was a Scottish poet and songwriter, whose works celebrated the beauty of her homeland and the resilience of her people. Her poems and songs were widely celebrated and helped to preserve the cultural heritage of the Scottish Highlands.

In the 19th century, Alannah O'Brien was an Irish humanitarian and advocate for the poor. She established several orphanages and schools, dedicating her life to improving the lives of underprivileged children in Ireland.

These are just a few examples of notable individuals who have borne the name Alannah throughout history, reflecting its deep roots in Irish and Scottish culture and its association with beauty, strength, and resilience.