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Goniopolar materials are an emerging family of materials that simultaneously exhibit both p-type and n-type conduction in a single compound along different crystallographic directions. Combining goniopolarity with magnetic properties opens up the opportunity of experimentally studying how both phenomena can be combined to give complex transport phenomena. Here we explore this by growing crystals of A-Mn-Pn (A=Alkali, Pn=Pnictogen) compounds and studying the anisotropic transport properties. A-Mn-Pn compounds are layered materials composed of stacking an alkali layer between layers of edge-sharing MnPn4 networks. We develop a flux-based synthesis to create mm-scale crystals of NaMnBi and NaMnSb, and confirm the phase purity via X-ray Diffraction. We establish that these materials are semiconductors with 0.52 and 0.32 eV band gaps, respectively, and antiferromagnets with Néel Temperatures over 240 K. We evaluate the in-plane and cross-plane electronic and thermoelectric properties and show that NaMnBi exhibits goniopolarity. Overall, this work establishes this family of compounds as both antiferromagnetic and goniopolar, enabling future opportunities to explore how they combine to influence magneto thermoelectric properties.