Sadie

The name is a contraction of Sarah, but has been used as an independent given name since at least the 19th-century. It is also sometimes used as a short form of Mercedes.

In 1889 she was the 67th most popular female name in the United States. Today she ranked in as the 78th most popular female name in British Columbia, Canada (2010) and the 118th most popular in the United States, (2010).

In the United States, Sadie Hawkins’ Day is a folk holiday in which junior high girls invite boys to a dance.

Source

1. http://www.behindthename.com/name/sadie