Noun of place from the root ن و ر (n w r) of نُور (nūr, “light, fire”). Cognate with Aramaic מְנָרְתָא (mənārəṯā), Hebrew מְנוֹרָה (mənōrā). Maybe there is a contamination with Ancient Greek μιλιάριον (miliárion, “miles indicator”) as the word means landmark.