E. Dehillerin Copper Cookware
You bought a vintage pan, didn't you? If it bears the Dehillerin mark AND HF, in all likelihood the HF is the owner's mark. This was not a sign of vanity, just prudence against pilferage.
You should research a little bit. You may be able to find out who or what HF was (e.g., "Hotel F_________").
Thanks for the information regarding this mark and the purpose behind it. This pan was so beautiful that I had to buy it. I don't have any knowledge about copper ware, but this particular pan has been well used and like I said, it's just too organic and beautiful. Once again, thank you for your time in giving me this feedback. I will do some research.