How Echo got His/Her Name

I have been wanting to explain for sometime how I came to the name Echo.

Echo was my 5th Egg, so I decided that I should just keep with a letter system. Echo is E in radio talk.

Also I watch Dollhouse on Pay TV, http://www.imdb.com/title/tt1135300/

In the show there is a women and her code name is Echo. She can be anyone, do anything. Just what I wanted for my Echo, to do what ever it wanted to do  So the name stuck.