Rennley is of British origin, derived from the Old English elements 'hremig' meaning 'dark' and 'leah' signifying 'woodland clearing'. It is a unisex name, although it's more commonly used for males. The name was popularized by the character Rennley Sothoryos from George R.R. Martin's "A Song of Ice and Fire" series. In the United States, Rennley has seen very limited usage, with fewer than five boys receiving this name in recent years.
"Rennley saw its debut this year with 8 newborns."