The name Alexandrea is a feminine form of the masculine name Alexander, which has its origins in the Greek language. The name is derived from the Greek words "alexo" meaning "to defend" and "andros" meaning "man". It was a popular name in ancient Greece, where it was borne by several notable figures, including the legendary conqueror Alexander the Great.

One of the earliest recorded instances of the name Alexandrea can be found in the works of the ancient Greek historian Plutarch, who wrote about a woman named Alexandrea who lived in the 4th century BC. She was the daughter of the Macedonian king Antipater and the wife of the Athenian general Leosthenes.

In the Middle Ages, the name Alexandrea was used in various European countries, often as a variant spelling of the masculine name Alexander. One notable bearer of the name was Alexandrea Leskova, a 15th-century Russian noblewoman who served as a lady-in-waiting to the Grand Duchess Sophia of Moscow.

During the Renaissance period, the name Alexandrea gained popularity in Italy, where it was often used as a variant of the name Alessandra. One famous bearer of the name was Alexandrea Strozzi, a 16th-century Italian poet and writer who was part of the Florentine literary circle.

In the 18th century, the name Alexandrea was popular in France, where it was often used as a variant of the name Alexandra. One notable bearer of the name was Alexandrea d'Aragon, a French noblewoman and courtier who served as a lady-in-waiting to Queen Marie Antoinette.

Another famous bearer of the name was Alexandrea Feodorovna, a 19th-century Russian empress who was the wife of Tsar Nicholas I. She was known for her charitable works and her support of the arts and education.

In the 20th century, the name Alexandrea gained popularity in the United States and other English-speaking countries. One notable bearer of the name was Alexandrea Haas, an American actress and singer who appeared in several Broadway musicals in the 1940s and 1950s.