Meaning and Name Origin
Riley \r(i)-ley\ as a girls' name (also used less commonly as boys' 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.
Riley is an unusual first name for women but a very prominent surname for all people (#187 out of 88799, Top 1%). (2000 U.S. Census)
Charted below is the baby name popularity of Riley for girls. Riley entered the list in 1990 and reached its apex rank of #38 in the U.S. in 2009, and is at #47 currently. (2014 Birth Statistics)
Below is a charted comparison of the popularity of the girl name Riley and corresponding names. Prominent related forms of Riley (#47 the previous year) listed in the Top 1000 are Rylee (#113 the previous year) and Reilly. These girl names reached the apex of their popularity in the year 2002 and are somewhat less popular today, with the form Reilly becoming less in vogue. Rylee (#113) and Riley (#47) are two of the more contemporarily stylish names for newborns here. (2014 Birth Statistics)