The name Marlon is a masculine given name of uncertain origin, with various theories proposed about its derivation and meaning. One theory suggests that it is a French variation of the name Merlin, which has its roots in the Brythonic language spoken in ancient Britain and is derived from the words "mer" meaning "sea" and "llyn" meaning "lake" or "pool."

Another theory links Marlon to the name Marlo, an Italian surname that may have originated from the Latin word "malleus," meaning "hammer." This connection could indicate an occupational name for someone who worked as a blacksmith or metalworker.

The name Marlon gained popularity in the early 20th century, possibly influenced by the legendary American actor Marlon Brando, who was born in 1924 and passed away in 2004. Brando's iconic performances in films such as "A Streetcar Named Desire" and "The Godfather" may have contributed to the widespread recognition and use of the name.

One of the earliest recorded instances of the name Marlon can be found in the 16th century, when it appears in the records of the English parish of Warwickshire. A notable bearer of the name in history was Marlon Brando Sr., the father of the famous actor, who was born in 1895 and died in 1965.

Other notable individuals with the first name Marlon include Marlon Wayans, an American actor, comedian, and writer born in 1972, known for his roles in films like "White Chicks" and "Scary Movie"; Marlon James, a Jamaican novelist born in 1970 and winner of the 2015 Man Booker Prize for his novel "A Brief History of Seven Killings"; and Marlon Blackwell, an American architect born in 1954, who has received numerous awards for his innovative designs.

While the exact origins of the name Marlon remain uncertain, its varied history and association with notable figures have contributed to its enduring popularity as a masculine given name.