ingr-endings are quite common in Old Norse names. They indicate a patronymic form meaning 'son/descendant of ...' or just 'one belonging to ...', 'one coming from ...', 'one of a specified kind' 
Related forms are
- Old Norse -ungr (see also -ungr-ending)
- Old High German -ing, -ung
- Old English -ing, -ung
In some cases, they are used to create Norse forms of the Latin ending -in (see -ingr).
List of Names with -ingr-endings
- ↑ Roland Otterbjörk: Svenska förnamn (1979)