What was Kirk Douglas' birth name?

Kirk Douglas is an American actor, producer, director, and author. Douglas was born Issur Danielovitch in Amsterdam, New York, the son of Bryna "Bertha" (1884–1958) and Herschel "Harry" Danielovitch (c. 1884–1950; records regarding his exact year of birth differ). His parents were Jewish immigrants from Chavusy, Mogilev Region, in the Russian Empire (present-day Belarus), and the family spoke Yiddish at home.

As an actor and philanthropist, Douglas has received three Academy Award nominations, an Oscar for Lifetime Achievement, and the Presidential Medal of Freedom. As an author, he has written ten novels and memoirs. Currently, he is No. 17 on the American Film Institute's list of the greatest male screen legends of classic Hollywood cinema, and the highest-ranked living person on the list. After barely surviving a helicopter crash in 1991 and then suffering a stroke in 1996, he has focused on renewing his spiritual and religious life. He lives with his second wife (of 63 years), Anne, a producer. He turned 100 on December 9, 2016.

Douglas blogs semi-regularly. Originally hosted on Myspace, his posts have been hosted by the Huffington Post since 2012. He is believed to be the oldest celebrity blogger in the world. Douglas and his wife have donated to various non-profit causes during his career, and are planning on donating most of their $80 million net worth.