The wine you tasted is from the producer Tiefenbrunner, I think. I last tasted it in the early 90s and always thought the wine was one of the best Müller-Thuraus that I had ever tasted with great concentration (for M-T that is).
I visited them in South Tyrol (Süd Tyrol) many years ago when they claimed (wrongly) that The Feldmarschall vineyard was the highest altitude in Europe. It was at around 1000m - at the time I knew of a Swiss Valais vineyard that was higher, and Aosta Vineyards in Italy that were higher still. Today there are even higher vineyards in Andalucia, Southern Spain I believe, possibly up to 1500m.
They do have a basic website and here is the link to the wine, but it doesn't mention the history of the name!
http://www.tiefenbrunner.com/feldmarschall20040.0.html