These are the known Afridhi from DA4:

Toska Rusa
Dost Suwat
Gul Hadda
Sher Yakub

Is there any pattern here? Do these names sound Persian at all? Or something else? Liguists, speak up? :)

-Havard

Arabic sounding except "Toska" and Dost

Rusa in Arabic means rice.

I think they are copycat sounds of middleasternish aura, rather than being really drawn on a particular language.

As I noted in a previous thread the name Afridi comes from Afghanistan. The Khyber Afridis were perhaps the most famous of the tribes encountered by the British in the First and Second Anglo-Afghan Campaigns of the 19th century. The language of that place is Pashtu/Pakhthun/etc. If I were to develop those peoples more in my campaign I would turn to works that detail the Pathân tribes of Afghanistan.