one comes the typical nearest-neighbor family mixing pattern in the mass matrices m i j ( U ) and m i j ( D ) that leads to the weak mixing angles being generally in approximate conformity with the corresponding Cabibbo–Kobayashi–Maskawa matrices. In the same way, the appropriate mass matrices can also be arranged for the lepton families that leads to the realistic description – both in the Standard Model and GUT – of the lepton masses and mixings, including neutrino masses and oscillations.