Adao is a Portuguese variant of Adam. Adam originates in Hebrew language and means "man". In the Bible, Adam is a figure from the Book of Genesis and supposedly the first human God created from the earth. He lived with Eve in the Garden of Eden until he ate a forbidden fruit and was expelled. In the US the popularity of Adam started growing in the 1960s and currently it is a very popular masculine given name not only in the English-speaking world, but in other languages as well.