Princess Frederica Dorothea Louise Philippine of Prussia was a member of the House of Hohenzollern. She was a niece of Frederick the Great, being the second daughter and third child of Prince Augustus Ferdinand of Prussia by his wife Margravine Elisabeth Louise of Brandenburg-Schwedt.

Princess Elisa Radziwiłł was a member of Polish nobility, of royal ancestry. She was the desired bride of Prince William of Prussia, who later became William I, German Emperor, but they were not allowed to marry.