Rhylee is one of many modern spellings of Riley, which comes either from the Irish surname Ó Raghallaigh, of uncertain meaning, or from an English place name meaning "rye clearing". The Rh- opening borrows from names like Rhys and Rhea. Rhylee reached its best US rank of 1081 in 2019, just outside the top 1000, and has since slipped to number 2191 in 2025 with 85 births.