Mitanni were from Punjab?

[Indo-Aryan]

There are regions in India where I keep seeing this weird changes happening with alphabets

V > B (Vikram > Bikram)
Za > Ja (Zath > Jath)
Sa > Sha

In Mitanni we have "bi-ir-ya-ma-aš-da" interpreted as "Priyamazdha". š is pronounced as Sh right?

Shouldn't it be "Bīryamāshda"
Bīrya > Vīrya


Which means energy, Valour etc

Similarly Mitanni "pa-an-za-" to be interpreted as "Pānja"


Do you see where I am taking it?
Mitanni were from Punjab


Any Punjabi in the house to explain this V to B and Za to Ja?

 

[Indo-Aryan]

Similarly

bi-ir-ya-aš-šu-wa (Mitanni)
Interpreted as Priyāśva (whose horse is dear)

Should be interpreted as
Vīrya-ashva (valourous/splendourous horse)

 

[Indo-Aryan]

Correct me If I am wrong but V in Sanskrit "Vanga" becomes B in Prakrit "Bangha"

 

[Indo-Aryan]

bi-ir-ya-ma-aš-da = whose wisdom is dear
(Scholarly interpretation)
(B to P)

Mine would be "whose wisdom is splendourous/Dignified/Heroic/unconquered".
(B to V)