OK so maybe I will continue. Polish nobels thought that only them form Polish society had origing in Sarmatia. (later some historicans realized that is is not true
agree on this but have something to add
In the last stage of existence of ancient free
Slavic world, before era of slavery occurred, on the territory of Poland, Czeska, Slovakia and today's Hungary- was positioned last great core of Sarmatian/Slavic world, recognized from all Sarmatians/Slavs.
Note designation for region Panonia (known as Roman province). Name, coming from Polish word Pan- Mister, Master and represent trace of time when border line of Polish influence and importance of warlords from Polish speaking/cultural area had great global Sarmatian/Slavic importance. So, by analogy and thru translation- Panonia would mean `ancestral land of masters/nobility` and because of great importance of Panonia for all Sarmatians (Slavs), that region later becomes target and was devastated, destroyed from Roman legions, Teuton knights and Huns.
That's why later Polish nobility claimed that `coming from Sarmatians` (referring on universal Slavic name from the powerful/glorious days) and also referring on fact that in their veins flow blood of ancient warlords and masters of great Sarmatian/Slavic tribal alliance.
Key reasons why old Sarmatian (Slavic) core was displaced from Western Balkan (Serbia) to the Poland, via Panonia- were on the first place security reasons and then economic factors. After all, population increased and seized larger portion of territory affected interests of nobility. But, it is amazing that we with almost absolute certainity can analize how blood (connections/interests) of ancient nobility (continued even in middle age) flow on the dirrection Balkan-Baltic. Very, very interesting fact, which support thesis that Slavic world is much older then many of us can imagine.
Old core (on the territory of today's Serbia) was consolidated, as even genetic science confirms, due to evolution from the Paleolithic, in time which come after Ice Age was finished.
That primordial ancestral population slowly increased, developed and spread along the Danube, Sava and Tisa Rivers (then, etc, etc rivers), especially after agriculture was invented. With time, Mediterranean trade becomes key source of profit for old warlords. On Mediterranean, Sarmatians (Slavs) clashed for the first time and fought for primate and for survivor, fighting against Semitic races.
Then, amber was found when Sarmatians (Slavs) reached North of Europe. Amber trade routes and security reasons due to advancing Semitic newcomers (Greece, Northern Italy), made that ancient nobility change center of its activity, and redirect its attention from Mediterranean to Panonia and territory of today's Poland, deeper in Sarmatian (Slavic) inland.
Fact that old Sarmatian core was on Balkan was one of key reasons why original form of Sarmatian name survived in use among Balkan Slavs and then spread along the Danube river together with population and stays remembered as universal name of all Sarmatians/Slavs (as old chronicles and linguistic science suggests).
On example of Siberia we see trace of Sarmatian (Aryan) intercontinental migrations and in Rg Vedic scripts we can read about time when Sarmatians clashed with Black races to preserve their primate even on Ind river. We clearly see that Sarmatian (Slavic/Proto Slavic) world was stretched from Ind River in today's India, via Eurasia and near East to the British islands and west of Europe.
To be continued [with focus on evolution of universal Slavic names based on forms with roots- SRB, SLAV and RUS]