Seyyeds of Turkey

I don't believe in these decendants, i seen alot of seyyids in europe (london, germany, sweden) wherever i went there is this arab/turk/whathaveyou who says "Hey i'm a seyyid!"

Even Jordan, the Hashemites claim they descended from the prophet for legitimacy to rule reasons, but there is no solid evidence.

"I don't believe either, everyone knows Mohammad had no offsprings. His children died all in their childhood."

So who did the Caliph Ali marry?

"How a can Turk be descendant of Muhammed? "

Ones ancestors can be of diffrent nation, surely Turks of all races should know that.

Ofcourse there are Seyyids out there in various countries. However i do agree with the point that the can be many false claims out there.

ask the muslims i don't know. As i said i don't claim this, but muslims do.

No Osmanli.  Maziar cannot provide any sources.  In fact, he is even ignorant of his own parents' beliefs.  According to Shia, a person who's mother is a Hashemite is given the title "Mirza". 

As said earlier, you need not be a direct descendant of the Prophet, but only a descendant of the same tribe.  The Hashemites - or Qureyshis, as they are more widely known -  just like members of other tribes, were traders who migrated to different places.  It is not at all surprising to find Qureyshis in different parts of the world.  Bani Hashim was one of the biggest tribes in Arabia.  Its members took pride in having so many children.  As a matter of fact, the tribe of Hashim has many branches within it and they're all able to trace back their ancestors.  The only so-called Hashemites who have not been able to prove their ancestry are the monarchs of Morocco.

It is wrong to assume that people link themselves to Bani Hashim for prestige or privilege.  The only place I could think of where such a lineage could be used/abused for some sort of privilege or social status is Iran.

Having Hashemite Turks is not at all odd.