Is it foolish to think that Varys, who has spies everywhere and was aware of Rhaegar's intentions to depose his father, knows of Jon Snow's true parentage? There's no textual evidence (that I can think of) to support it (for instance, his conversations with Ned about Robert's bastards), but it seems unlikely that one of the greatest spymaster's in history wouldn't know the greatest secret in Westeros' recent history.
First off I should note I donāt believe Varys was right about āRhaegarās intentions to depose his fatherā ā I think he was deliberately stirring shit in House Targaryen as part of his Blackfyre restoration plans, and the supposed secret backer of the Harrenhal tourney being Rhaegar is a red herring placed in TWOIAF on purpose. (I think thereās a lot of things Yandel is very wrong about in TWOIAF, and while some like magic and the Others and such are obvious, thereās many political mistakes and oversights too. Heās a very unreliable narrator, deliberately so.)
Secondly, Varys is an excellent spymaster, but he doesnāt know everything. He only knows what his little birds can see or hear. (Like, Olenna had loud singing cover up her conversation with Sansa, Littlefinger had Sansa meet Dontos in the godswood specifically to avoid the little birds, and thatās why LF reported the Tyrell betrothal plan to Tywin while Varys hadnāt heard anything about it. Also Varys doesnāt seem to have had any awareness of Sandor and Sansaās interactions.) Note that Varys was still fairly new to Westeros at the time of Robertās Rebellion and almost certainly didnāt have a full spy network yet, certainly not in the Red Mountains where the Tower of Joy was, and probably not in Starfall either. Jaime relates that during the Rebellion āPrince Rhaegar could not be foundā, which means people were looking but couldnāt find him, which means Varys didnāt know either. (Or if he did know, he wasnāt saying, again to stir shit.) The Tower of Joy was very out of the way.
But still, itās possible that Varys does know about R+L=J, either from his spies back when or gathered knowledge since then. If so, heās likely factored in the possible revelation of Jonās parentage into his plans to bring Aegon to the throne. Whether Varys has false counter-information ready in case of a reveal, or if heād simply be using a semi-truthful legal strategy (Aegon is older; even if Rhaegar married Lyanna it was bigamous and thus illegal; etc), or even if he doesnāt know and finds out when the secret is made public (if itās made public), it probably doesnāt matter. Varys is very utilitarian: heāll do what he must, whatever it may be.
(btw I donāt mind if someone asks the same question of all the meta people on tumblr, presumably in hopes of getting different answers, but personally I prefer if itās proceeded with a statement that thatās what youāre doing. It makes me feel less like a meta monkey dancing for your entertainment, thanks.)









