Wendy was created by J.M.
Barrie for
Peter Pan (1904) from the expression
my friendy pronounced as
my fwendy by his little friend
Margaret Henley (who died c. 1895 at age six) or, as variation, from the expression
fwendy-wendy (from
friendy pronounced as
fwendy and a rhyming word) that
Margaret used to refer to
Barrie.
But an independent use of
Wendy, for boys and girls, was known in the middle 19th c., probably originated as nickname of Welsh names starting with
Gwen- or as nickname of Anglicizations of these names. For example, a genealogical researcher has found examples of use since the end of the 18th c.:
"I must admit to being annoyed when I tell people my name. They always insist on mentioning
Peter Pan. During my family reseach I have come across the name
Wendy twice in the 1881 census of England, one born 1840, and one born in 1880. The magazine Family History also states that
Wendy, along with the names
Marian and
Shirley were once boys names, and that in 1797 a boy named
Wendy was apprenticed to some one in Glos."
http://www.wendy.com/wendyweb/history.html
Lumia
http://onomastica.mailcatala.com