Scodonius. I don't know why that one is so hard.
Also Angonce, I thought it was Agonance originally, but it's Angonce which I would assume to be pronounced Ang-gones, but apparently its ANN-gahnts which makes no sense to me.
I used to pronounce Jaller as its spelled because of the Swedish mask of light dub, and similarily, Dume.
Then there's Ehrye, air-yay according to the BIONICLE: Encyclopedia Updated, but its pronounced EYE-ree on the Nuju promo disk. Always used the latter.
Vezon and Gelu I also pronounce like geh-loo and Vee-zonn.