As in, after he's revealed to be Ob and people want to scrub his name from things?
Something relating to that it feeds into 'Parity' lake... Mercy Canal? Mercy causing parity/justice?
Shadow's Run, referencing how it was used for Ob crate smuggling
Slaughter's Run, referencing how it was used for Kell crate smuggling
Titan's March, referencing how Borne probably travelled along it on his escape
King/Queen's Canal, named after whatever monarch replaced Aodhan
On reflection, 'Titan' definitely shouldn't be used- after all, 'Titan' has a terribly specific meaning in Risur, and the titans themselves might get cross at their name getting plastered on some upstart colossus.
I think I would name it after Aodhan (Aodhan Canal), Warhero and king. That way it would probably still just be "the canal" to the common people or if the new king/Queen is selfish enough, then name it after him/her.