Rowynn is a feminine spelling of Rowan, which comes from the Irish surname Ó Ruadháin, "little red one", and also names the rowan tree with its bright red berries. The y and the double n follow the pattern of Raelynn and Brooklynn. Rowynn hovered between number 3500 and 5300 for a decade and reached number 2990 in 2025, its best rank to date.