amazons, after all
I think I found the source of the connection of the labrys with the amazons: sagaris 

 saga^ris , eôs Ion. ios, hê; pl. sagareis Ion. -i_s:a weapon used by the Scythian tribes, Hdt.1.215, 4.5;

 A. axinas sagaris eichon Id.7.64 ; by the Amazons, Aristarch. in 
 PAmh.2.12 ii 10; by the Persians, Amazons, Mossynoeci, etc., 
 X.An.4.4.16, 5.4.13:acc. to Hsch. single-edged, and joined by 
 X. with kopis and machaira, Cyr. 1.2.9, 2.1.9, 4.2.22; 
 double-edged acc. to AP6.94 (Phil.).

i.e. an axe-like weapon, sometimes described as single-edged, and sometimes as double-edged. This shouild probably be put in a Sagaris article.