Yes,he did...but I thought about his son,also Bolko,who is the current Head of the family,born in 1936,son of Bolko(1910-1936) and Clotilde de Silva y Gonzales de Candamo,daughter of 8th Marquis de Arcicollar(1898-1978)...
What is interesting here is that Clotilde was firstly married to Prince Hans Heinrich XV von Pless...after 2 children with Hans(Konrad and Beatrix)she married her stepson Bolko,son from first marriage of Hans with Daisy Cornwallis-West...She also had 2 children with Bolko which makes very interesting family relations and connections...Clotilde became sister-in law of her own children!