Matrae

ārum, f.
I. dat. plur. MATRABVS, for Matris, Inscr. Grut. 29, 1), or Matres, more freq. Matronae, the protecting goddesses of a country, city, or place: MATRIS AVGVSTIS D. D., Inscr. Grut. 90, 1; so ib. 2 sq.
Lewis & Short
A Latin Dictionary, 1879
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