Proto-Mon-Khmer *ɓaar

→ Arem hêl (inherited)

→ Bahnar ʼbar (inherited)

→ Nyah Kur บาร (inherited)

→ Khasi ar (derived)

→ Khmer ពីរ (inherited)

→ Mon ၜါ (inherited)

→ Muong hàl (inherited)

→ Pnar ar (derived)

→ Vietnamese hai (inherited)