They've adopted full Old Norse spellings for the satellites that were at first called Thrym, Skadi and Suttung: these are now Thrymr, Skathi and Suttungr. (See the official names list at the Gazetteer of Planetary Nomeclature for confirmation.)
Perfectionists will want to edit numberedmoons.ssc accordingly.
![Wink :wink:](./images/smilies/icon_wink.gif)
Grant