Haggis. Noxxius is playing a Russian Roma. So a "gypsie" to most people

As for possible Connection:
In general, Johnny Rune is something of a known name due to being a shining beacon for trouble. Also for him being drunk on the job to much. But he is also the kind who is owed favors everywhere due to being the sacrificing kind.

Varvara- The two share history, and the rune was Johnnys way to try and keep Varvara from going bonkers. After he accidentally charged her with arcane mojo.

Morgan: As a person who have ties to old Norse ways, Johnny would likely have approached her once or twice in regards to discussing magic. Becouse the Irish and Norse folklore intersect, albeit in a unruly fashion. That said. I bet the Unseelie contacts look at Johnny as a pest, being associated with the Norse and Vikings, who pestered Ireland for quite some time in the past.

Mira: Old World magic like Miras contractor would likely recognise a rune priest and that Johnny is like a walking magic battery.