This is for those persons and institutions known to have owned the Voynich Manuscript at some point.
“Ethel Lilian Voynich, née Boole (May 11, 1864–July 27, 1960) was an Irish novelist and musician...Ethel Lilian Voynich
“Also to be found on the other Voynich Wiki here  Also known as Jiří Bareš, Georgius...Georg Baresch
“Hans Peter Kraus also known as H. P. Kraus or HPK. 12 October 1907-1 November 1988. Austrian...Hans Peter Kraus
“Born 1894, Buffalo, New York, United States, died 1961. Worked in Wilfrid Voynich's bookshop and...Anne Margaret Nill
“Wilfrid Michail Voynich (31 October 1865 (Old Style - in use in the Russian Empire at the time...Wilfrid Voynich
“From the longer Wikipedia page , which lists some of the other holdings. Yale University's...Beinecke Rare Book and Manuscript Library