The name Anais has its origins in ancient Greek, derived from the word "anaitos" meaning "pure" or "innocent." It gained popularity during the classical era in Greece, where it was given to female children as a symbolic representation of their purity and innocence.

In ancient Greek mythology, Anais was the name of one of the Oceanids, the three thousand daughters of the Titans Oceanus and Tethys. This association with the divine beings of the sea further added to the name's mystique and its connotations of purity and natural beauty.

During the Byzantine era, the name gained widespread use among Greek Christians, who often chose it for their daughters as a reflection of their religious values and the idea of spiritual purity. It was also adopted by other cultures influenced by Greek culture, such as the Romans, who adapted the name to their language as "Anaitis."

One of the earliest recorded instances of the name Anais can be found in the works of the ancient Greek poet Sappho, who lived on the island of Lesbos in the 6th century BC. In her poems, she mentions a woman named Anais, though little is known about her historical significance.

Throughout history, several notable figures have borne the name Anais. One of the most famous was Anais Nin, a French-American writer and essayist born in 1903 and known for her erotic writings and exploration of female sexuality. Her literary works, including her diaries, have become influential in the fields of feminism and gender studies.

Another prominent Anais was Anais de Villeray, a French noblewoman born in 1630 who played a significant role in the early settlement of New France (modern-day Canada). She is remembered for her contributions to the development of the colony and her philanthropic efforts.

In the 18th century, Anais Toudouze, a French painter and engraver, gained recognition for her intricate and detailed etchings and engravings. Her works captured the essence of the Rococo style and were highly prized by art collectors of the time.

Moving into the 20th century, Anais Conté, a French singer and actress born in 1932, achieved fame for her performances in musicals and films. She is particularly remembered for her portrayal of Cosette in the original French production of Les Misérables.

Lastly, Anais Mitchell, an American singer-songwriter born in 1981, has gained critical acclaim for her folk albums and her Broadway musical "Hadestown," which was inspired by the ancient Greek myth of Orpheus and Eurydice.