Shirleyanne is a combination forename following frequent practice in the Caribbean. This name is Trinidadian and may be unique.
Shirley was originally only an English male name, from the Old English "bright wood" or "bright clearing". The use as a female name seems to date from Charlotte Brontë's 1849 novel "Shirley". This is about a family who were sure they would have a boy and had chosen the name Shirley before the birth. When a girl was born they decided to stick with the chosen name for their daughter and this quickly became the generally accepted use!
Anne and its variants, found frequently throughout Europe.It is from Hebrew Hanna/Hannah, "favoured one".