Etymology of Sorts

Livia is a tad confused when it comes to dissecting words and names. Last week she told me, out of the blue, that "Ala" is the first name and "Bama" is the last name. Tonight I read a book where the goose makes a bed out of eider. I asked Livia what she thought eider was. "Oh," she said, and paused. "The first name is "Ida. We can say Ida for short instead of EIDER."