Riley as a girl's name (also used as boy's name Riley), is pronounced RY-lee. It is of Irish and Gaelic origin, and the meaning of Riley is "courageous". Variant of O'Reilly. Lately adopted for girls and boys.
This graph shows how "riley" have occurred between 1800 and 2008 in a corpus of English books.
Examples of usage for riley:
University of Iowa, IowaCity, Iowa, 1919. Riley, Alice C. D., TheOne- Act Play- StudyCourse. "Contemporary One-Act Plays Compiler: B. Roland Lewis" , Sir James M. Barrie George Middleton Althea Thurston Percy Mackaye Lady Augusta Gregor Eugene Pillot Anton Tchekov Bosworth Crocker Alfred Kreymborg Paul Greene Arthur Hopkins Paul Hervieu Jeannette Marks Oscar M. Wolff David Pinski Beulah Bornstead Herma.