Old Saxon
The grammar of Old Saxon was fully inflected with five grammatical cases ( nominative , accusative , genitive , dative , and instrumental ) , three grammatical numbers ( , plural , and dual ) and three grammatical genders ( masculine , feminine , and neuter ) . 
<triplet> nominative <subj> grammatical case <obj> instance of <triplet> accusative <subj> grammatical case <obj> instance of <triplet> genitive <subj> grammatical case <obj> instance of <triplet> dative <subj> grammatical case <obj> instance of <triplet> instrumental <subj> grammatical case <obj> instance of <triplet> plural <subj> grammatical number <obj> instance of <triplet> dual <subj> grammatical number <obj> instance of