The hydrogen dynamics in the α-phase of Pd 1− x Ag x H y has been studied by proton nuclear magnetic resonance (NMR) measurements. Jump frequencies of the hydrogen atoms in the metal lattice have been deduced from the dipolar spin-lattice relaxation rates Γ 1d by applying the BPP model. In PdH y , the temperature dependence of Γ 1d is well described by a single jump process for all hydrogen atoms. In contrast, in the palladium–silver alloys Pd 1− x Ag x H y , the Γ 1d data indicate more than one jump process with different activation energies. Two and three processes could be separated for x=0.1 and x=0.3, respectively. In both alloys, the diffusion process with the lowest activation energy ( E a=226 meV) is comparable to that in pure palladium. The jump processes with higher activation energies occur more frequently in Pd 0.7Ag 0.3 than in Pd 0.9Ag 0.1. This indicates higher energy-barriers for jumps between O-sites in silver-rich environments. Direct measurements of the long-range diffusion coefficients D were performed by pulsed-field-gradient (PFG)-NMR at temperatures up to 450 K. For both Pd 1− x Ag x H y samples, D( T) is well represented by a single Arrhenius law with the diffusion parameters D 0=3.0×10 −7 m 2 s −1 and E a=230 meV for x=0.1 and D 0=2.1×10 −7 m 2 s −1 and E a=260 meV for x=0.3. The diffusivities calculated from the jump frequencies of the hydrogen atoms are in good agreement with these PFG results and also with measurements using the time-lag technique.