It is rare for a polar bear to reach the age of 36, but Katjuscha of the Berlin Zoo is celebrating that milestone today. She is the oldest polar bear in a European zoo. I don't know of any polar bears in the world who are older. There is a lady bear in the Milwaukee County Zoo in the U.S., Snow Lily, who is two weeks younger than Katjuscha.
Katjuscha does have a younger sister, born in 1989, Antonia the famous dwarf polar bear who now lives in Gelsenkirchen. Their parents were mother Nadine of Karlsruhe, and father Willie, who lived in the Berlin Zoo but would come to Karlsruhe during breeding season to visit the girls.