I know that in various books the man has been identified as Parra-o-coom (also known as He Bear or Bull Bear), but I have my doubts. There are other sources that only state that the picture was taken in Parra-o-coom´s camp, which is in my opinion much closer to the truth.
In Russel Belous´ and Robert Weinstein´s book about photographer Will Soule, who took the above photo, it is stated that the Indian may be Johnny Horseback. He resembles indeed an individual pictured in other Soule photographs and designated as “Horseback´s son”. I believe it is him.
My book, _Comanche Political History_ (1996), has been criticized for not mentioning either Peta Nocana nor Quanah. That is for the very simple reason that neither are mentioned in the contemporary history materials.
The earliest mention of Quanah seem to be J.J. Sturm's account of his 1875 trip out to the Llano to try to bring in the Kwahadas.
The earliest mention of Nocona wasn't until the 1880s with whats'his name's bio of Quanah.