Tseng: Ten-seng (i don't know why, it's just the way i've always pronounced it, probably coz a guy named Tzeng-pronounced that way- climbed Mt.Everest...)
Heidegger: Hi-degger
Sephiroth: Sep-e-roth, or Sef-e-roth
Bugenhagen: Bew-ghen-hay-ghen
Elmyra: El-my-ra
Nibelheim (I always have problems with this): Nib-EL-heim, or Nibbly-ham (depending on my mood)