Piney's cabin is the same cabin as Bo Crowder's from Justified Season 1.
'Unser' is not the only German name on the show. Unser means 'our' in German, but also Agent Stahl has a German name, meaning 'steel'. Trager (Tig) sounds like the German 'Träger,' which means 'carrier'. The fact that Teller translates to 'plate' in German is most likely a coincidence though.