The name Marcellus has its origins in the ancient Roman culture, tracing back to the Latin language. It is derived from the Roman family name "Marcellus," which is a diminutive form of the name "Marcus." The name Marcus is believed to come from the Latin word "mas," meaning male or masculine.

Marcellus was a prominent name among the ancient Romans, particularly during the Roman Republic and Empire periods. One of the earliest recorded uses of the name Marcellus can be found in Roman historical records, referring to Marcus Claudius Marcellus, a celebrated Roman consul and military leader who lived from 268 BC to 208 BC. He was known for his victories against Hannibal during the Second Punic War.

In the New Testament of the Bible, Marcellus is mentioned as a Christian at Rome, to whom the Apostle Paul sent greetings. This reference suggests that the name was in use among early Christians in the 1st century AD.

Throughout history, several notable individuals have borne the name Marcellus. One of the most famous was Marcellus I, who served as Pope of the Catholic Church from 308 to 309 AD. Another prominent figure was Marcellus of Ancyra, a 4th-century bishop and theologian who played a significant role in the Arian controversy.

During the Renaissance period, Marcellus II was the name of a Pope who reigned for only 22 days in 1555. Despite his brief papacy, he is remembered for his efforts to reform the Church and promote education.

In the 18th century, Marcellus Gilmore Edson, an American Baptist minister and abolitionist, was born in 1809. He was known for his active role in the anti-slavery movement and his work in establishing educational institutions for African Americans.

Another notable figure named Marcellus was Marcellus Shale, a 19th-century geologist who lent his name to the famous Marcellus shale formation, a significant source of natural gas in the eastern United States.