This photograph of Tsar <a href="https://en.wikipedia.org/wiki/Nicholas_II_of_Russia" class="extiw" title="w:Nicholas II of Russia">Nicholas II</a> and Tsarina <a href="https://en.wikipedia.org/wiki/Alexandra_Feodorovna_(Alix_of_Hesse)" class="extiw" title="w:Alexandra Feodorovna (Alix of Hesse)">Alexandra</a> of Russia with their <a href="https://en.wikipedia.org/wiki/OTMA" class="extiw" title="w:OTMA">four daughters</a> is from the Beinecke Library and can be used with attribution.  The correct credit line is Romanov Collection, General Collection, Beinecke Rare Book and Manuscript Library, Yale University.
Romanov family
Attribution
<a rel="nofollow" class="external text" href="http://brbl-dl.library.yale.edu/vufind/Record/3601086?image_id=1000105">Romanov Family Album 3, page 14</a>, <a rel="nofollow" class="external text" href="http://brbl-dl.library.yale.edu/vufind/Record/3601086?image_id=1000113">image no. 8</a>