We present line-shape analyses of magnon Raman spectra in 1 geometry of a PrBa2Cu2.7Al0.3O7 crystal for various excitation energies. The description is based on the Heisenberg model of antiferromagnetism. Out of resonance, we describe the experimental data by taking into account phonons and a two-magnon excitation using the experimental superexchange energy =720 cm−1 and a damping parameter =200 cm−1 of the one-magnon states. After subtraction of the fitted line shapes, we identify three additional spectral features at 730 cm−1, 1170 cm−1, and 3500 cm−1. All three show enhanced intensities close to the two-magnon resonance at 2.79 eV excitation energy. This strongly suggests that these excitations have a magnetic rather than a phononic origin.