Julia Beelaerts van Blokland
Beelaerts van Blokland was born on 15 June 1886 in The Hague as a member of the Beelaerts van Blokland family, an old Dutch patrician family. She held the noble title of jonkvrouw. Her father was policitian Gerard Beelaerts van Blokland and her mother was editor . She had one older sister and had five brothers, including politicians Frans Beelaerts van Blokland,  and .