He was the father of [[William Kristol]] and the husband of historian [[Gertrude Himmelfarb]]. <ref>http://www.nytimes.com/2009/09/19/us/politics/19kristol.html</ref> | He was the father of [[William Kristol]] and the husband of historian [[Gertrude Himmelfarb]]. <ref>http://www.nytimes.com/2009/09/19/us/politics/19kristol.html</ref> |