2. #Samarkand, contra #Wikipedia, is not 'stone city'. The first element /sm’r/ remains unexplained. On #Sogdian sm’rknδh [Ancient Letters], cf. Chin. Samojian 颯秣建 Gr. Μαρακάνδοι, scholarly consensus exists only on second compound, #Sogdian 'town, city'.
4. #Sogdian snk 'stone', #Manichaean, #Christian, #Buddhist Sogdian sng < *asanga-; Av. asәnga. @avzaagzonunaada rightly points out I-Ir. 'stone, sky' semantic range, Skt. aśman-, Av. asman-, and that #Sogdian sm’r cannot render 'stone'. Caveat lector.
5. #Samarkand, origins and locale, spawned several speculations in popular #historical accounts over the early medieval period. Correctly, 'north of Scythia' in that #Hereford#MappaMundi prepared by Richard of Haldingham ca. 1290, as 'Samarcan'.