Roen is a modern spelling of Rowan, the Irish name Ruadhán that means "little red one" or "red-haired", and also the name of the rowan tree with its bright red berries; it is sometimes linked instead to the Norman city of Rouen. Its slimmed-down spelling matches names like Koen and Soren. Roen has risen from number 11774 in 2000 to a peak of number 1751 in 2024 and ranks number 2162 in 2025.