Von

Here Jarl van Hoother becomes "Jarl von Hoother" for a brief moment, as jiminy also becomes "jimminy", (jimminy) although they revert back right after this.

'van' is Dutch .. it was used by both commoners and noble families as well, and usually refered to a specific geographic place (in this case Howth)

'von' is German .. it was predominately used by noble families until the Middle ages, after which time it became used by commoner and noble families alike

If not a typo, perhaps the 'von' alludes to the contents of the cellar .. stocked with German ale?