Sheila is a feminine given name of Irish origin. It is an anglicized form of the Irish Gaelic name Síle, which is a pet form of the name Síghle. Síghle itself is derived from the Old Irish word síghle, meaning "fairy."

The name Sheila is believed to have emerged in the late Middle Ages, around the 15th or 16th century. It was initially used in Ireland and Scotland before spreading to other parts of the English-speaking world.

One of the earliest recorded references to the name Sheila can be found in the 16th-century Irish annals, where it appears as a variant spelling of Síle. However, the name did not become widely popular until the 19th and 20th centuries.

Some notable historical figures named Sheila include:

1. Sheila Scott (1922-1988), a British aviator and pioneer in long-distance flight.
2. Sheila Kaye-Smith (1887-1956), an English novelist and writer known for her novels set in the English countryside.
3. Sheila Gish (1942-2005), an American actress and dancer, best known for her roles in films such as "The Last Picture Show" and "Badlands."
4. Sheila Michaels (1939-2021), an American civil rights activist and advocate for disability rights.
5. Sheila Lukins (1942-2009), an American cookbook author and co-founder of the famous Silverpalate food company.

Throughout history, the name Sheila has been associated with various meanings, including "fairy-like," "blinding," or "blind." This is likely due to its connection with the Old Irish word síghle, which is related to the concept of fairies or supernatural beings.