Marceline is the French feminine form of Marcellin, from the Roman name Marcellus, a diminutive of Marcus that goes back to Mars, the god of war, and is usually read as "little warrior". The animated series Adventure Time, with Marceline the Vampire Queen, introduced the name to American parents. There were almost no Marcelines in 2000; the name entered the top 1000 in 2020 and has raced to number 424 in 2025.