But the pronunciation does not have to be correct. The way similar words (and names) are pronounced in a given language is a matter of that language alone. You cannot demand that a Chinese student must pronounce the name as a Dane would; you cannot require that a Russian student knows and uses the original spelling, either. So, Sorren Quirky Guard is the best I can do; my preference, of course, would be to have a more correct sounding "native" spelling that an English speaking person would be able to read.
I am Danish, and have yet to hear anybody not a Dane pronounce Søren Kierkegaard[0] correct. I wouldn't have a clue how to rewrite the name so that it becomes more clear.
[0]: https://upload.wikimedia.org/wikipedia/commons/6/6c/Da-S%C3%...