Kagome metals with the formula $R{M}_6{X}_6$ ($R =\mathrm{rare}$ earth, $M =3\mathrm{d}$ transition metal, and $X =\mathrm{Sn}$/Ge) provide a rich platform for exploring magnetic and electronic phenomena, with tunable properties enabled by the combination of rare-earth elements and transition metals. In this study, we report the structural, electrical, and magnetic properties of kagome metal $\left(\mathrm{N}{\mathrm{d}}_x\mathrm{G}{\mathrm{d}}_{1-x}\right){\mathrm{V}}_6\mathrm{S}{\mathrm{n}}_6$. We demonstrate that substituting lighter Nd atoms at the Gd site tunes the complex magnetic ground state of $\mathrm{Gd}{\mathrm{V}}_6\mathrm{S}{\mathrm{n}}_6$ into a ferromagneticlike one. Moreover, the isotropic magnetization of $\mathrm{Gd}{\mathrm{V}}_6\mathrm{S}{\mathrm{n}}_6$ becomes anisotropic, with the $c$ axis emerging as the easy axis. Transport measurements reveal a strong coupling between magnetism and electronic properties, with negative magnetoresistance observed at low magnetic fields in all compositions. In addition, a fourfold anisotropy component tends to emerge in end compounds at higher magnetic fields. These findings highlight the role of rare-earth substitution in tuning magnetic anisotropy and magnetotransport behavior in $R{M}_6{X}_6$ compounds, featuring a nonmagnetic kagome layer, with potential implications for spintronic and topological applications.

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• Crystal structure
• Magnetic anisotropy
• Magnetic order
• Magnetotransport
• Kagome lattice
• Topological materials
• Crystal growth