←
Proto-Germanic *armaz (inherited)
←
Proto-West Germanic *arm (inherited)
←
Proto-Indo-European *h₂erH- (derived)
←
Proto-Indo-European *h₃erbʰ- (derived)
→
Old English earm (cognate)
→
Jersey Dutch arm (cognate)
→
Luxembourgish aarm (cognate)
→
Pennsylvania German aarem (cognate)
→
Saterland Frisian äärm (cognate)