This old man, Sleipnir's pilot, he was a wizard now.
"Väinämöinen will bring your granddaughter back safely Merlin, a great wizard will not ever let his guild down" Dakilla spoke with confidence.

I was able to figure this out, but I'm not sure most readers will be able to. Fenrir's current crew (excluding the folks who arrived via Pete's mining ship) consists of Robert, John, and Azraella (the wounded one). Sleipnir's current crew consists of Bjarne, Gwen, and another Hylobo. But with Bjarne's name not appearing in the chapter (after the error that I pointed out), that means he's only referred to as Väinämöinen.

I think there should be some text that explicitly mentions Bjarne by name, as the one who got the wizard nickname Väinämöinen. As for Gwen and the other Hylobo with him aboard Sleipnir, I think it's okay not mentioning their names, given the context.