Gunnar Selheden, were art thou?

I’ve recently received a huge amount of various spam messages that have been addressed to Gunnar Selheden @ various domains of mine.

In the past, the spam has arrived with various addresses that are just random. This behaviour has changed a bit for now, and maybe in the future there will be more poor Gunnars as recipients.

I’m curious to know where the name has been picked up. Probably I’ll never know (but you never know).