I could believe they were related - there is a similarity of colour. They're definitely from the same period - 60s/70s. In all the thing looks free form, which makes it hard to place in any camp. Seeing the colour it could be Belgium (Doyen or Boussu) or German. Definitely not Dutch, most unlikely from Scandinavia. Not Czech, not Polish. US is a possibility - Tiffin, Fostoria perhaps. And if it were Canadian I think you would have figured it out by now?