The name Neill has its origins in the Gaelic language and culture. It is derived from the ancient Irish word "niall," which means "champion" or "cloud." This name was particularly popular in Ireland and Scotland during the Middle Ages.

One of the earliest recorded instances of the name Neill can be found in the Annals of Ulster, a chronicle of medieval Irish history. This text mentions several figures named Neill, including Neill Caille, who was the King of Ui Maine in the 7th century.

In the 9th century, the Annals of the Four Masters, another important Irish historical text, records the exploits of Neill Calnene, the High King of Ireland from 833 to 856 AD. This Neill was known for his military campaigns against the Viking invaders.

The name Neill also appears in Scottish history, with one notable figure being Neill Campbell, the 10th Earl of Argyll, who lived from 1433 to 1513. He was a prominent Scottish nobleman and played a significant role in the politics of his time.

In literature, the name Neill is featured in several works, including James Joyce's novel "A Portrait of the Artist as a Young Man," where one of the characters is named Neill Moran.

Some other notable individuals with the name Neill throughout history include:

1. Neill Armstrong (1920-2012), an American astronaut and the first person to walk on the moon.
2. Neill Blomkamp (born 1979), a South African-Canadian film director known for movies like "District 9" and "Elysium."
3. Neill Buchanan (born 1960), an American actor and comedian known for his role in the TV series "The Nanny."
4. Neill Dennis (born 1943), a Canadian actor and voice artist, best known for his work in animated series like "X-Men" and "Dragonball Z."
5. Neill Marriott (1918-2001), a British actor and playwright, known for his work in theater and television.

Overall, the name Neill has a rich history that spans various cultures and time periods, with its roots firmly planted in the ancient Gaelic traditions of Ireland and Scotland.