Princess <a href="https://en.wikipedia.org/wiki/Sophia_of_Prussia" class="extiw" title="en:Sophia of Prussia">Sophia of Prussia</a> and her later husband King <a href="https://en.wikipedia.org/wiki/Constantine_I_of_Greece" class="extiw" title="en:Constantine I of Greece">Constantine I of Greece</a> …
<a href="https://de.wikipedia.org/wiki/Wilhelm_H%C3%B6ffert" class="extiw" title="de:Wilhelm Höffert">Wilhelm Höffert</a>
1888-09
<i>Portraits of Royal Children</i> Vol.36, <i>1887-1888</i>; <a rel="nofollow" class="external text" href="https://www.rct.uk/collection/2904643">Royal Collection RCIN 2904643</a>