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Family: William Siebern / Princess Bertha Cantacuzene (F2863)
m. 11 Nov 1934
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 | Julia Grant (1876-1955)
|
 | Prince Michael Cantacuzene (1900-1972)  |
| Princess Zenaida Cantacuzene (1908- ) |
| William Siebern (1895- ) |
| Princess Bertha Cantacuzene (1904- )
|