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First siblings to hold world heavyweight titles simultaneously

First siblings to hold world heavyweight titles simultaneously
Who
Wladimir Klitschko, Vitali Klitschko
Where
Not Applicable
When
11 October 2008
Wladimir Klitschko (Ukraine) won his IBF (International Boxing Federation) heavyweight title on 22 April 2006, his second WBO (World Boxing Organization) heavyweight title on 23 February 2008 and his WBA (World Boxing Association) heavyweight title on 2 July 2011. As of 5 June 2013 he has retained all three of these titles. Vitali Klitschko (Ukraine) won the WBC (World Boxing Council) heavyweight title for a second time on 11 October 2008 and as of 5 June 2013 he has retained this title. As of 5 June 2013 the brothers hold four world heavyweight titles between them.