The name Wendy ranked 280th in popularity for females of all ages in a sample of 2000-2003 Social Security Administration statistics and 115th in popularity for females of all ages in a sample of the 1990 US Census.
This name makes a strong showing in state popularity data of the 1970s, but makes few (if any) appearances on lists compiled after that period.
Writer J.M. Barrie numbered among his childhood friends one Margaret Henley, who fondly called him by the baby-talk name ''fwendy wendy.'' He took the last part of this happy formulation for the name of the motherly girl in his 1904 play Peter Pan.
Some Ancient Germanic names may have also played a part in suggesting the name to Barrie. These include Wendelburg and Wendelgard. However, it is not likely their influence could compare to that of the playwright's little friend.