←
Old English -as (cognate)
←
Middle Dutch -s (inherited)
←
Middle Dutch -es (mention)
←
Middle Dutch -sch (inherited)
←
Proto-Germanic *-ōz (cognate)
←
Proto-Germanic *-ōs (derived)
←
Proto-Germanic *-as (inherited)
←
Proto-Germanic *-is (mention)
←
Proto-Germanic *-iskaz (inherited)
←
Middle Low German -s (derived)
←
Middle Low German -es (mention)
←
Proto-West Germanic *-isk (inherited)
←
Proto-Indo-European *-iskos (derived)
←
Old Dutch -es (inherited)
→
Old English -as (cognate)
→
Norwegian Bokmål -isk (cognate)