Kingdom Hearts II Are there Machine created Nobodies? Synthetic Unbirth's?

I was pondering the idea...when heartless were created from machines, they got the "heartless" emblem on them, signifying they are synthetic, not wild darkness, just beings that use the darkness.

Almost all of the nobodies have the nobody insignia on them. ALMOST.
Were those created from machines??? I mean, no creature just walks around with a "stamp" on its head saying what species it is...and even though this is the kh2 section it makes me wonder...some of the BBS scans show the unbirths (the fat ones mainly) with the Unbirth symbol on them...ARE THEY CREATED?

 

Only people's hearts can make true Heartless right? So if thats true where do the Nobodies come from? The empty shell that is left behind is the body of the person, so there has to be a person before a Nobody is created.

 

I'd say most likely.

 

The Unbirth one is possible, but I'm pretty sure the only nobodies that don't have the symbol are the humanoid ones.

 

the artificial heartless are made from data, while nobodies are made by nothingness, you can't make nothing.