When Sauron, as Annatar, came to teach the art of crafting magic rings of power, Celebrimbor was the one that he taught.
Granted that Celebrimbor did not know who Annatar really was but is it possible that Sauron (Annatar) knew who he was? Celebrimbor is the grandson of Fëanor, the one who named Morgoth, who committed the first kinslaying, and the one who brought the curse to his family (Curse of Fëanor).
I would imagine that Morgoth wasn't too happy about Fëanor or his family and it makes me wonder if Sauron thought the same way, and chose Celebrimbor on purpose as a way to bring even further misfortune to that lineage.
Does anyone know if it was just a coincidence or was that by Sauron's malicious design?