Juliana Young Koo

On May 24, 2017 (more than 75 years after her first husband's execution), Koo died in Manhattan, New York City, New York. She was 111 years, 240 days old.

She released her autobiography titled 109 Springtimes: My Story in 2015. On September 26, 2015, Koo became a supercentenarian, when she reached the age of 110 years.

Frances Young (1940-1992) was a philanthropist and preservationist. She was married to Oscar Tang (son of Tang Ping-yuan). In 2000, Tang gave $10.2 million for the Frances Young Tang Teaching Museum and Art Gallery at Frances' alma mater Skidmore College. A gallery at the Metropolitan Museum of Art is also named after her.

Shirley Young (1935-2020) was a prominent business executive for Grey Advertising and General Motors. She was married to George Hsieh and Norman Krandall. Both marriages ended in divorce. She died in December 2020 and was survived by three sons (all with Hsieh) and seven grandchildren.

Geneviene Young (1930-2020) was a book editor most known for Love Story by Erich Segal. She was married to Cedric Sun and Gordon Parks (from 1973 to 1979). Both marriages ended in divorce, but she and Parks remained close until Parks' death in 2006. She helped establish the Gordon Parks Foundation after Parks' death and continued to oversee the foundation and Parks' estate until her death in February 2020.

She married Clarence Kuangson Young Chinese: 楊光泩; pinyin: Yáng Guāngshēng; Wade–Giles: Yang Kuang-sheng) on September 6, 1929. In the 1930s, she became the mistress of Chinese diplomat V.K. Wellington Koo (Chinese: 顧維鈞). The scandal resulted in Young's being transferred to the Chinese consul general in Manila from 1939 to 1942. Young was arrested by the Japanese during World War II and executed on April 17, 1942 together with 7 consulate staff. After the death of her husband, she took her three daughters to the U.S and became Koo's mistress again. Per Koo's arrangement, she worked at the United Nations in New York. In 1956, Koo divorced his wife and married her in September 1959.

Juliana Young Koo, born Yen Yu-yun (Chinese: 嚴幼韻; pinyin: Yan Youyun; September 26, 1905 – May 24, 2017), was a Chinese-American diplomat who worked in the UN Protocol Department. Her first husband, Chinese diplomat Clarence Kuangson Young was executed by Japanese armies during World War II. She became the long-term mistress for the diplomat and politician V.K. Wellington Koo, before her husband's death. After the war, she moved to the United States, in 1956 Koo divorced his wife and married her.

On September 26, 1905, Koo was born into a wealthy family with business and government ties in Tianjin, China as Yen Yu-yün (or Yan Youyun). Her father Yan Zijun [zh] (1872–1931) and her grandfather Yan Xinhou [zh] (1838–1907) were both prominent businessmen. She attended Keen School when she was 14.