Is Master Xehanort related to Xehanort, Xemnas 或者 Xehanort's Heartless 或者 are they different?

Master Xehanort is related to all three.

In Birth 由 Sleep, Master Xehanort releases his own 心 and sends it into Terra's body. Terra, refusing to give up his body, fights Master Xehanort and wins but Master Xehanort still has Terra's body after the fight. Later, Aqua fights Xehanort who is still using Terra's body. Aqua beats Xehanort and he is having trouble fighting back because Terra is fighting Xehanort inside of him. Xehanort then tries to remove Terra's 心 from inside himself but then passes out into the realm of darkness. Aqua then gives her life to save Terra's body. Ansem the Wise finds Xehanort passed out asks,"Whats your name?" then Xehanort says his name and thats all he remembers, his name thats how Xehanort, Ansem the Wise's apprentice, is made.

Xehanort's Heartless, who called himself Ansem, and Xehanort's Nobody, Xemnas, were created between Birth 由 Sleep and Kingdom Hearts 1 at the same time when Xehanort 迷失 his heart.

Let me know if I left anything out.

Well, Xemnas is Xehanort's Nobody. Xehanort's Heartless is... eh... Xehanort's Heartless.

I don't know much about Master Xehanort, but either he is Xehanort's Unbirth due to he aslo changed his name like Xemnas did, 或者 he is Xehanort himself.

i think they are because of the tromendus power.

Okay to clear some things up.

Apperently there's 2 differint individuals named Xehanort, so far we know.
The one is Master Xehanort and the other one is Xehanort, Ansem The Wise's apprentice.

Okay lets get to the case.

Firstly.
Xehanort(the apprentice) Betrayed Ansem The Wise in Kingdom Hearts(1) and continued the research of hearts and became an Heartless'

Now Xehanort's Heartless claimed to be Ansem and troughout Kingdom Hearts(1) we were reffered to him as Ansem.

Now, we all know what happens when a person with a strong 心 and mind turns into an Heartless.
What happens? A Nobody is created.

And as we thought that we've defeated "Ansem" (Xehanort - the apprentice) his nobody was actualy out there gathering strength.

Now as for everyone in the Organization XIII(13), they're names are actualy an anagram of they're original name (there's added an X to all of them if 你 notice) as for example: Roxas = Sora+x, Xemnas = Ansem+x.
Now Xemnas is the Nobody of "Ansem" which actualy is Xehanort, Ansem The Wise's apprentice.

So I really doubt that there is any afiliations between Master Xehanort and Xehanort The Apprentice. Yet, it is possible.

I hope this wasn't too confusing and for everyone seeking the answer, then I really hope this helped (:

master xehanort 迷失 his 心 which created xehanort's heartless which made xemnas(xehanort's nobody). so yes they are the same person.

no, they are not related but the thing is,
terra has some darkness in his 心 and when he got defeated 由 master xehanort he 迷失 his memories and ended up in raidiant garden where ansem the wise took him in and under the apprenceships of ansem the wise he did some test on the hearts and created his heartless (ansem) and his nobody (xemnas) THATS WHY THEY HAVE THE SAME EYES! and some of the same features and kinda the same hair cut

Xehanort is and always has been ansem the way this happend is because he fused with terra and when terra 迷失 his 心 to Xehanort it created xemnas ok