When I adopted her, they already called her Greta, but I wasn't sure if I'd call her that. After two days of brainstorming other names, none of them seemed to fit her, so we stayed with Greta. We had a Golden Retriever called Rita because of Rita Hayworth, the actress.
So, Greta is in honor of another actress: Greta Garbo.
She's also CPO at Notegraphy (chief playtime officer).