Player used Sending Spell after being sent back in time

So I was feeling like Mr brave DM and messing with time travel shenanigans for my party. They have been sent thousands and thousands of years back for reasons not quite relevant here, and my lovely player decided to use Sending to communicate with his fey monarch- a version of Titania where “Titania” is a passed down title not their true name. Long story short- does it make more sense for the words sent via Sending to be received by the fey holding the title Titania in the time they ended up in, the fey he knows in the future as Titania who is much younger now, or just let the spell cross time and be received (maybe with a delay or something)?