CIRCLE WITH A DOT

@Catvalente depends on the age of said uncle (onkel) I might go with Onkel Anders.
Donald Duck is called Anders And in danish and he is also called Onkel Anders.
There is also an Onkel Anders in an old Danish family movie which is quite known (Far til fire). So Onkel Ander will have some cross references to other known works.
But besides that I don’t really think there is a really good comparison to Uncle Bob, except a very common name for that generation.