←
Middle English hardy (inherited)
←
Middle English hardi (mention)
←
Old French hardi (derived)
←
Old French hardi (mention)
←
Middle Low German herdich (cognate)
←
Old High German harti (cognate)
←
Old High German herti (mention)
←
Old High German hart (mention)
←
Occitan ardir (cognate)
→
English Hardt (mention)