Intermetallic compounds Lu 2 PdGa 3 and Np 2 PdGa 3 have been found to crystallize in an orthorhombic CeCu 2 -type structure with the Imma space group. The lattice parameters at room temperature are: a = 0.4382͑2͒, b = 0.6870͑3͒, and c = 0.7593͑3͒ nm for Lu 2 PdGa 3 and a = 0.4445͑2͒, b = 0.7089͑3͒, and c = 0.7691͑3͒ nm for Np 2 PdGa 3 . The electronic ground-state properties of these compounds were established by magnetic, calorimetric, electrical resistivity, magnetoresistance, and Hall coefficient measurements. The experimental data reveal a metallic behavior for Pauli paramagnetic Lu 2 PdGa 3 , characterized by Sommerfeld ratio ␥ = 2.5 mJ/ K 2 mol Lu and temperature-independent susceptibility 0 ϳ 1 ϫ 10 −4 emu/ mol. In contrast to the nonmagnetic Lu 2 PdGa 3 reference, Np 2 PdGa 3 behaves as a local-moment ferromagnet with the Curie temperature T C = 62.5͑2͒ K. Low-temperature properties of Np 2 PdGa 3 are characterized by a large Sommerfeld ratio ␥ = 120͑2͒ mJ/ K 2 mol Np and a small Fermi momentum k F = 0.44 Å −1 . The observed features in Np 2 PdGa 3 are well interpreted by assuming competition of three different interactions: Rudermann-Kittel-Kasuya-Yosida ͑RKKY͒, crystal electric field ͑CEF͒ and Kondo effect, which are represented by respective energies k B T RKKY , ⌬ CEF , and k B T K . We argue that Np 2 PdGa 3 is the Np-based ferromagnetic Kondo-lattice system with T K Ͻ T RKKY Ϸ ⌬ CEF .