73%RatingSave Gender Masculine & Feminine Usage English (Modern) Pronounced Pron. RIE-lee [key] Meaning & History From an Irish surname which was derived from the given name Raghailleach, meaning unknown. See All Relations · Show Family TreeRelated Names Feminine FormsRylee, Ryleigh, Rylie See Popularity DetailPopularity Last ranked #903 in 2004 (f) #957 in 2008 (m) United States Categories modern English, surnames, uncertain etymology Entry updated December 3, 2014