[Aegon the Unworthy]

Heres the confusing part....

Originally Rhaegar thought it must be his son, which must be the PTWP....then circumstances showed him to be wrong. As his son apparently had his brains dashed out....then Aemon concluded to Sam that the texts never said "He" persay.....so it could be Dany. Of course if they never said "He" they also never said "She".

So Aegon could still be Aejon. You know maybe Lyannas promise to Ned was to protect Aejon as his own. Lyanna was the type that when something of this import as the PTWP is made known to her she would react in earnestness. We assume she's at the Tower of Joy when Ned finds her, because thats where the Kings Guard is but they could be there protecting Aejon and Lyanna killed by some of Roberts supporters while defending Rhaegar. But that still doesnt account for the obvious age difference. So Im rambling....

Alleras the Sphinx is Sarella, one of the Sand Snakes (the Vipers children) the name and reported place is too cute a coincidence to be far off.