vijayjohn wrote:The English Wikipedia article on the river
at least gives a citation for the possibility that it's named after the Batı Raman mountain. It also mentions the possibility that it refers to an Ottoman unit of weight but without a citation.
I sort of doubt the Batı Raman explanation - sounds like folk etymology. OED suggests the unit of weight explanation; the unit in question is also called a "batman." Some claim that "batman" dates back to proto-Turkic, whereas others suggest that the "man" part is from mina
(which became "man" in Persian), also known in English as maund
suggests the following etymology for Batman:
ETü: [ Kaşgarî, Divan-i Lugati't-Türk, 1073]
batmān: al-minā [yaklaşık yarım kilogramlık tartı birimi]
<< ETü batman tartı birimi ~ OFa padmān ölçü (Kaynak: D-M sf. 269)
Not: [düzeltildi: 24/02/2018] Aynı İrani sözcük modern Farsçaya paymān "ölçü" şeklinde gelmiştir.
Also, that's really cool that you found old Turkish textbooks in your house!