1. Zodiac sign; they seem slightly less obvious than planets. I'd go with
Aries,
Gemini "Gem" or
Leo.
2. City, for the same reason as above.
Vienna,
Ravenna,
Milan3. Probably normal name with weird nickname, so my legal name doesn't stand out, but I have a fun name for friends and family.
4. Animal. I like a lot of bird names.
5. Either would make me cringe, but probably liquor because I like the name
Midori.
6. Surname that sounds like a first name.