Spearthrower
Thrower of spears
Spearthrower...... can you pinpoint the HRE dialect ?
I'm afraid not - my knowledge of northern European languages is not very deep.... I'd hazard a guess that it is supposed to represent "Early New High German"
http://web.uvic.ca/geru/472/472enhg.htm
They probably used regional German dialects' pronunciations as a facsimile for this "dead" language.
All guesswork though I am afraid!