The gold and blue one in the top photo and the pink one in the bottom photo are from Britches of Georgetown. (yep, they're old.)
2nd one is Hermes.
The navy with light blue diamonds and the dark brown paisley are Paul Stuart. I can't remember the others. (acquired them from various places over the last 30+ years.)
These are just a very few of my squares. I really love pocket squares. Have worn and collected them since I was a teenaged kid.