If you and your brother's buy a house (joint partnership) can your wife get anything?

[zddoodah]

Can she claim anything of the property if it's not in her name?

Anyone can claim anything. I can claim to be the Queen of England or the great-great-great-grandson of Thor.

Whether her claim would have any validity would depend on the relevant facts, almost none of which you provided, and the one fact you did provide (that the wife's name is not on title) is not dispositive.

Your half is marital property...therefor she has a legal claim.

We don't know that because the OP didn't provide relevant facts.

So my Wife will get half of what I OWN even if her name's not on anything? WOW that's dumb.

No, and no one said or implied that.