I think that the Dutch word zus means 'sister'. I did not find any better way of finishing this round of Sunday Stamps A-Z than these 2006 stamps, with illustrations taken from an old book for children to learn to read.
For this round, I picked up the project of showing stamps dedicated to women. You can see here all the Women on Stamps featured on this blog. I am glad I did it, and I really enjoyed learning about such interesting people. I hope you have done so!
Don't forget to go to Sunday Stamps to enjoy more Z-stamps!