https://commons.wikimedia.org/w/index.php?title=Special:UploadWizard&campaign=wsc-us

Father of Kaiser Wilhelm Society: G=2/c (natural units).
https://commons.wikimedia.org/wiki/File:Friedrich_Wilhelm_Denke.jpg

Mother of Kaiser Wilhelm Society: c=2/G (natural units).
https://commons.wikimedia.org/wiki/File:Emilia_Laude_Denke.jpg

Daughter of Kaiser Wilhelm Society: 2=G*c (natural units).
https://commons.wikimedia.org/wiki/File:Emma_Augusta_Henrietta_Denke.jpg

There you go.
G-D