Demosthenes X

You mean, closer to cause than kaz?

Yes.

That'll take some getting used to. I always pronounced it K - AS.

Voh-doh Bass (is in the fish)

Kaz...? like Taz?

Val (Think of the name Valerie)
As ( Sounds like "us")

I've always pronounced it "Cause kTah".

Vay-gah
Pee-ko
Phen-riss
Jen Crow-lee
Jay-mo Jah-kah-taa

Uhh...

Beff... Pike. I don't have any idea how you could get this one wrong, and if you've managed it; by the gods I don't wanna know.

Dioan Silk though is misleading and I have no idea how you'd say it in the real world. However you like, go with it. I'll likely never speak to you using my actual voice.

Well someone who doesn't know english might pronounce it:

Beef Pick.

Vance Jas.

Vance - as in Lance, Dance, Prance, etc.

Jas - would sound Jay-s (as in Jason, minus the on)