Near-IR spectra of the four images of the gravitationally lensed quasar PS J0147+4630 at redshift z > 2 are presented for the first time. Using archive data of two 10-m class telescopes, we analyse the unexplored near-IR spectral region including the Mgii, Hβ, [O iii] and Hα emission lines (0.9−2.4 μm). We obtain the image flux ratios for the emission lines and their underlying continua, and measure a reliable quasar redshift of 2.357 ± 0.002. We also find evidence of an outflow in the Hα emission and estimate a quasar black-hole logarithmic mass
log [MBH/M⊙] = 9.34 ± 0.30 (see paper).