Exotic ordering phenomena resulting from magnetic frustration continue to attract attention as newtypes of frustrated compounds emerge. A very recent development in this field focuses on the socalledtripod-Kagome magnetic lattices that consist of corner-sharing triangles occupied bymagnetic rare-earth ions. Similarly to the well-known spin-ice compounds, to which thesematerials are structurally related, the anisotropy of the rare-earth ions can vary from Ising-like tonearly isotropic (Heisenberg-type) or XY-type. Very recently, a 2D analog of a "Kagome spin ice"ground state has been suggested for this tripod-Kagome structure in Dy3Mg2Sb3O14 by Z. L. Dunet al. [PRL 116, 157201 (2016)]. Here we suggest to study two new members of the samestructural family, available as high-quality powder samples, namely Nd3Mg2Sb3O14 andTb3Mg2Sb3O14, using time-of-flight neutron spectroscopy.