http://en.wikipedia.org/wiki/Earth#cite_note-Terra-1
Alternate names for Earth - Tellus or Terra, Gaia.
http://www.livescience.com/33373-moon-name.html
In Latin, our satellite's name is "Luna." Because a significant chunk of English comes from Latin, many terms associated with the moon are related to this Latin name — for example, the adjective "lunar," and the noun "lunatic," an old-fashioned word for a mentally ill person. (Madness was thought to be correlated with the phases of the moon.)
In Greek, our moon is named "Selene," as is the moon goddess of ancient Greek mythology. The English word "selenology," or the study of the moon's geology, derives from it.
What about in other languages?
http://answers.yahoo.com/question/in...7073409AANH3gd
Moon in a few languages:
Albanian: hëna
Catalan: lluna
Croatian: mjesec
Czech: měsíc
Danish: måne
Dutch: maan
Estonian: kuu
Filipino: buwan
French: lune
Galician: lúa
German: Mond
Hungarian: hold
Indonesian: bulan
Italian: luna
Latvian: mēness
Lithuanian: mėnulis
Norwegian: måne
Portuguese: lua
Romanian: lună
Spanish: luna or mes
Sun in a few languages:
Spanish: sol
Romanian: soare
Portuguese: sol
Norwegian: sol
Latvian: saule
Italian: sole
Hungarian: nap
German: Sonne
French: soleil
Dutch: zon
Danish: sol
Albanian: dielli