The name Adelaide has its origins in the Germanic languages and can be traced back to the 8th century. It is derived from the Old German words "adal" meaning "noble" and "heid" meaning "type" or "sort." The earliest recorded spelling of the name was "Adalheida."

One of the earliest recorded instances of the name Adelaide was in the 9th century, referring to Adelaide of Burgundy (931-987), who was the Queen of Italy and Holy Roman Empress. She was an influential figure in her time and played a significant role in Italian and German politics.

In the 12th century, Adelaide of Louvain (1103-1151) was the Countess of Arlon and Burgundy. She was known for her piety and charitable works, founding several monasteries and hospitals during her lifetime.

Another historical figure with the name Adelaide was Adelaide of Saxe-Meiningen (1792-1849), who was the Queen Consort of the United Kingdom and Hanover as the wife of King William IV. She was known for her patronage of the arts and her support for various charitable organizations.

In the 19th century, Adelaide Ristori (1822-1906) was an Italian actress and one of the most famous tragedians of her time. She was renowned for her performances in the works of William Shakespeare and other classical playwrights.

A more recent historical figure with the name Adelaide was Adelaide Weinfield (1892-1979), an American activist and suffragist who played a significant role in the women's suffrage movement in the United States.

Throughout history, the name Adelaide has been associated with nobility, strength, and grace. It has been carried by queens, empresses, and influential women from various walks of life, leaving a lasting impact on the cultural and historical landscapes of their respective eras.