_Peter Frederick George OLDENBURG _____________________________________+
| (1784 - 1812) m 1809
_Constantine Frederick Peter HOLSTEIN-GOTTORP ________________________|
| (1812 - 1881) m 1837 |
| |_Catherine Pavlovna of HOLSTEIN-GOTTORP-ROMANOV _______________________+
| (1788 - 1819) m 1809
_Alexander Frederick Constantin HOLSTEIN-GOTTORP _|
| (1844 - 1932) |
| | _Georg Wilhelm August Heinrich Belgicus NASSAU-WEILBURG _______________+
| | | (1792 - 1839) m 1813
| |_Therese Wilhelmine Friederike Isabelle Charlotte of NASSAU-WEILBURG _|
| (1815 - 1871) m 1837 |
| |_Charlotte Luise Friederike Amalie Alexandrine of SAXE-HILDBURGHAUSEN _
| (1794 - 1825) m 1813
|
|--Peter Alexandrovich HOLSTEIN-GOTTORP
| (1868 - 1924)
| _______________________________________________________________________
| |
| _Maximilian Joseph Eugene Auguste Napoleon BEAUHARNAIS _______________|
| | (1817 - 1852) |
| | |_______________________________________________________________________
| |
|_Eugenia Maximilianovna BEAUHARNAIS ______________|
(1845 - 1925) |
| _Nicholas I Pavlovich HOLSTEIN-GOTTORP-ROMANOV ________________________+
| | (1796 - 1855)
|_Maria Nikolaievna of HOLSTEIN-GOTTORP-ROMANOV _______________________|
(1819 - 1876) |
|_Friederike Louise Charlotte Wilhelmine of HOHENZOLLERN _______________+
(1798 - 1860)