Not sure what you are talking about?

No relative at all as mentioned. Not to my knowledge anyway.

"Assi" , no idea where the nickname comes from.

Hans is a Christian name, but also a shortened version of Johann or Johannes. Hahn can also be a version of son of Hahn, ie equivalent of Johnannson. Shortened over the years. Lots of Hahns have the name John, Johann, Johannes.

Some of the images refer to Hans "Assi" von Hahn. Whether the von or of is correct in the images I don't know. But there was a Graf von Hahn ie a Graf is a Count or Earl. A movie producer Graf von Hahn was married toi a Hahn, the Grafina von Hahn-Hahn. There are a number of towns in Germany called Hahn. Not sure which was the seat of the "County".