(urth) Hyacinth and Seawrack

[Lee Berman]

I've been reading Return to the Whorl and had a question. I think it is
for James Wynn. Wasn't it you who suggested some sort of connection or
shared identity between Hyacinth and Seawrack? I tried looking/searching 
but couldn't find the post.
 
I thought of it because I ran across a section where Horn is describing
to Vadsig how he and Maytera Mint and Patera Silk and Seawrack overthrew
the Ayuntamiento.
 
If the inclusion of Seawrack was an auctorial error I'd find that pretty 
interesting, as I am more interested than most in the autobiographical
aspects of Gene Wolfe's work.
 
More likely it is an example of unreliable narrator error I suppose. As 
such my first interpretation would be that the error occurs due to 
relationship parallels. Horn's paramour is Seawrack. Pas/Typhon's paramour is 
Kypris. Silk and Hyacinth, possessing aspects of the gods, provide the bridge 
between these two pairs, thus Seawrack and Hyacinth are confused.
 
Am I missing some some real world (within the story) way that Seawrack and 
Hyacinth can be connected in the way that Silk and Horn are connected?