The name Donal finds its origins in the Gaelic language and culture of Ireland. It is derived from the Old Irish word "Domhnall," which means "world ruler" or "world mighty." This name was likely formed from the combination of the Irish words "domhun" (world) and "fhal" (ruler or mighty).

The name Donal has a long and rich history in Irish tradition, with some of the earliest recorded examples dating back to the 6th century CE. One of the most notable figures with this name was Donal IV, who ruled as the King of Ailech, a medieval Irish kingdom, in the late 10th century.

In ancient Irish literature, the name Donal appears in various texts and manuscripts, including the Annals of Ulster and the Annals of the Four Masters, which were chronicles of Irish history written in the 15th and 17th centuries, respectively.

Throughout the centuries, several prominent figures have borne the name Donal. One of the earliest recorded was Donal Mor O'Brien (1180-1194), who was the King of Thomond, a medieval kingdom in Ireland. Another notable figure was Donal Cam O'Sullivan Beare (c. 1561-1618), an Irish clan chief and military leader known for leading the O'Sullivan Beare clan during the Nine Years' War against English forces.

In more recent history, Donal Ryan (born 1976) is an Irish writer and novelist, known for his works such as "The Spinning Heart" and "The Thing About December." Donal Óg Cusack (born 1977) is a former Irish hurler who played for Cork and is considered one of the greatest goalkeepers in the history of the sport.

Donal Logue (born 1966) is a Canadian-American actor and producer, known for his roles in films like "Gothika" and television series like "Grounded for Life" and "Gotham." Donal Henahan (1929-2007) was an American music critic and journalist who worked for The New York Times for over three decades.

These are just a few examples of notable individuals throughout history who have borne the name Donal, which has its roots in the ancient Gaelic language and culture of Ireland.