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4-6 What corresponds to the earliest demonstrated record of the name ‘Adam’ in Semitic languages, is the Old Egyptian ‘Atum’ [https://www.eoht.info/page/Heliopolis%20creation%20myth ] - a primordial God of which the biblical ‘narrative’ of the story of ‘Adam’ is believed to be a ’rescript’ [https://www.eoht.info/page/Atum%20and%20Adam ]. There also in Arabic the word ‘adamah’ <أدمة> meaning ‘dermis’ which is derived from the word adamah <אֲדָמָה> ‘red earth or ground’ in Hebrew; and <אדם> for Adam ‘man’ or ‘humankind’. Hebrew in turn adopted all this ‘Occult Knowledge’ from Old Egypt and Sumer. Secondly, the name in its current form Uthman ~ Othman ~ Osman, etc. and all of its variations [https://en.wikipedia.org/wiki/Osman_(name)#Usman ] was first borrowed from Arabic into other cultures of the Middle East and the Near East after the Islamic expansion. 
Before this took place you will not be able to find any evidence of the name except the name ‘Adam’ and its variant forms [https://en.wikipedia.org/wiki/Adam_(given_name) ]. Arabic, in turn, had borrowed the name from the older Semitic intermediate cultures including: Sumerian, Akkadian, Aramaic; and also Old Egyptian through Old South and Old North Arabian languages - all of which existed in the region before Arabic even started to evolve.