What does Riley mean?
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 (#210 out of 150436, 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. (Top 1000 Birth Names Statistics, 2014)
Prominent related forms of Riley (#47 the previous year) are Rylee (#113 the previous year) and Reilly. These girl names reached the apex of their popularity in the year 2002 (usage of 0.6487%) and are somewhat less popular today (usage 0.6133%, down 5.4%), with the form Reilly becoming less in vogue. Rylee (#113) and Riley (#47) are two of the more contemporarily stylish names for newborns here. Below is a charted comparison of the popularity of the girl name Riley and corresponding names. (Top 1000 Birth Names Statistics, 2014)