Fine-grained (0.8-1.1 mu m) (Ba1-xPrx)(Ti1-y-x/4Cey)O-3 (BPTC; x, y = 0.03-0.05) ceramics prepared by the mixed-oxide reaction route exhibit a pseudo-cubic perovskite crystal structure commensurate with a diffuse high-permittivity peak around room-temperature. Comparing to La/Ce [J. Am. Ceram. Soc. 89 (2006), 3112-3123] or Nd/Ce [Mater. Lett. 223 (2018), 25-28] co-doped BaTiO3, BPTC ceramics with x = 0.03 and y = 0.05 exhibit a larger diffuseness parameter, gamma (= 1.99), of the phase transition with temperature, thereby enhanced temperature stability; at fixed Ce content (y = 0.05), the temperature of the permittivity maximum (T-m) decreases at a rate of -29 degrees C/at% Pr for BPTC, this shifting rate is between that of La/Ce (-30 degrees C/at% La) and Nd/Ce (-27 degrees C/at% Nd) co-doped BaTiO3. In this study, five BPTC compositions meet Y5V specifications, in particular x = y = 0.04 ceramics exhibit the best optimized Y5V characteristics, with a high room-temperature permittivity (epsilon(RT)' similar to 11000) and a low dielectric loss (tan delta = 0.027). The defect chemistry of BPTC ceramics was inferred from Electron Paramagnetic Resonance in combination with ionic radii arguments.