Name Confusion

An old friend was born in Norway and is named Sveinung – but he goes by Sven. He shared this the other day:

So I says, “Hello Marvin, I’m Sven.”

Marvin says, “Swen?”

Me, "Sven."

“Oh, Vance?” questions Marvin.

“No. It’s Sven,” I say.

Marvin shakes his head and mutters, “Tell my wife, bad ear …”
His wife says, “I’m Judy.

I say “I’m Sven.”

Judy says, “Hi Stan,” and mutters, "that wasn't so hard"