PCelt. *magino- ‘stone, place’. The attribution in IEW (709) to the root *meǵh₂- 'great' is possible, cf. Skt. mahī́- 'earth' (< *'the great one') and PCelt. *magos 'field', which might also be related. In this connection, it is interesting to note that W maen specifally means a stone 'having some speciality or a particular use', according to GPC. The OIr. form in -ā is a collective built from *magino-, like Lat. loca from locus. Ranko Matasović. "magino-" in: Etymological Dictionary of Proto-Celtic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill, 2015. Brill Online. February 10, 2015. < http://iedo.brillonline.nl.ludwig.lub.lu.se/dictionaries/lemma.html?id=16851 >
Robert Farren, PIE culture words collection, 2017
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