This letter presents the results of stimulated Raman scattering (SRS) spectroscopy of tetragonal Y 0.4 Gd 0.6 VO 4 vanadate crystals having a partly disordered zircon-type structure. Picosecond laser pumping revealed previously unexplored χ (3) -nonlinear interactions comprising the generation of an almost two-octave spanning Stokes and anti-Stokes frequency comb, self-third harmonic generation as well as cross-cascaded processes involving four different Raman-active modes. The recorded spectral lines have been assigned to the participating molecular vibrational modes of the (VO 4 ) 3− structural units of the studied crystal. In addition, this work provides a brief review of all known SRS-active tetragonal and monoclinic vanadates of the form REVO 4 including their χ (3) -nonlinear properties and steadystate Raman gain coefficients for first Stokes generation.Keywords: stimulated Raman scattering (SRS), partly disordered tetragonal vanadate, Y 0.4 Gd 0.6 VO 4 , Raman crystal, zircon-type crystal, stokes and anti-stokes frequency comb, cross-cascaded nonlinear optical effects, many-phonon SRS, Raman frequency converter