Tauftauf

• "Well, teuf-teuf," I said moodily and withdrew. (P.G. Wodehouse: Very Good Jeeves: The Love That Purifies, 1930) teuf-teuf in French means the sound of a train ("töff töff" in my native German, no idea about English). So it suggests "I'll be gone, bye-bye" or something like that. Obviously "teuf-teuf" was a common phrase in Edwardian upperclass slang?
• taufen: (German) to baptise
  • St Patrick was a disciple of St Germanus, hence the use of German words
  • baptism → John the Baptist → Giovanni Battista → Giambattista Vico
  • baptism → Jordan → Giordano Bruno

• mishe mishe to tauftauf: "me me to thou thou"

• tau, tau: (Greek) T, T → Tris-tram/Tram-tris, Tris-tan/Tan-tris, etc.