:* What evidence is there that "Sun Tiantian" is ever referred to as just "Tian Tian"?. The second proposal is definitely not OK, since there is at least 1 female panda "Tian Tian" http://www.giantpandazoo.com/panda/history/pandas-in-germany/zoo-berlin/giant-pandas-in-berlin/ who died in 1984 in Berlin Zoo.]