Quadruple Yukawa unification in the minimal supersymmetric standard model

Predictions for m1, tan β, mντ are calculated for quadruple third family t-b-τ-νt Yukawa unified models in the MSSM. The renormalisation group equations for the 3 families of the MSSM, including the right-handed neutrino, are presented. For right-handed tau neutrino Majorana masses that are bigger than 1011 GeV, the tau neutrino mass is consistent with present cosmological bounds. The mt, tan β predictions are approximately equivalent to those in triple third family Yukawa unified models.