[en] We present a Majorana neutrino scenario in a F-theory SU(5) GUT model, which is recently proposed in [1]. The mass scale of the neutrinos arises from integrating out heavy Kaluza-Klein modes on the right-handed neutrinos. The participation of non-holomorphic Kaluza-Klein mode wave functions dilutes the mass hierarchy in comparison to the quark and charged lepton sectors, in agreement with experimentally measured mass splittings. The neutrinos are predicted to exhibit a 'normal' mass hierarchy, with masses (m₃, m₂, m₁)∼.05x(1,α_GUT^1/2,α_GUT) eV. The neutrino mixing matrix exhibits a mild hierarchical structure with θ₁₃∼α_GUT^1/2∼0.2. We also predict mass measurements in single and double beta decay experiments.