In other threads you claimed that names of some - allegedly Germanic - tribes, gave names to geographic regions. This is of disputed because there are also other theories regarding the origins of these names (and it is also disputed whether those tribes were Germanic or not).
Please note, that one of West Slavic, Lechitic tribes, was named Vistulans (Wiślanie).
By your logic, I could claim that this tribe gave name to the river, not inversely.
The same can apply to some, allegedly Germanic, tribes - they could be named after regions in which they lived, rather than regions being named after them. Also Polanie - as you even noticed in another thread - were named after plains / fields, in which they lived.
Śląsk (Silesia) in Old Slavic language meant "moist land" or "marshy land". The Medieval Slavic tribe of Ślężanie (Sleenzane - according to "Bavarian Geographer", Zlasane according to Czech sources)was named after "marshy lands" in which they lived. Despite this fact, you claim that it was named after a Germanic tribe of Silingians.
I disagree - in my opinion Silingians were also named after "moist land" or "marshy lands" in which they lived.
Actually, Ancient Silingians and Slavic Sleenzane / Zlasane could even be
the same tribe, living in the same area few hundreds years later.
Please note that Silesia was a region inhabited by humans already since the Neolithic period. Góra Ślęża (Mount Ślęża), located in Silesia, was a place of some Ancient cult of some Pagan gods already in the Neolithic era, according to archaeological findings.
=======================================
Even today in Silesian dialect (gwara śląska), the word "śląpać" means "to cry" or "to have wet eyes".
In Early Medieval Slavic languages terms for "to cry" or "to have wet eyes" were: "ślęp", "ślęg" or "ślęga".
At the same time "ślęga" meant "wet weather", as well as "mud".
========================================
As for Mount Ślęża - there are three theories as to origins of its name:
1) From allegedly Germanic tribe of Silingians
2) From Early Slavic word ślęga (wet weather, mud)
3) even older, Indoeuropean origins
But first names of this mountain that are known from written sources, are as follows:
- 1108 in monte Silencii ("mountain of silence" in Latin - but it could be phonetical translation, not translation of meaning)
- 1149/50 ecclesia in monte Silentii
- 1209 in monte Silencii
- 1242 in monte Slenz
- 1245 in monte Slez
- 1260 circa montem Slezie
Place of Pagan cult in Mount Ślęża dating back at least to 5th century CE: