Here to help set things straight when you're unsure of what really happened.
Disclaimer: None of the graphics/information on here is mine. I am in no way affiliated with J.K. Rowling and all that. Just an obsessive Potterhead with a keyboard and vast knowledge of the series.
- Please note that this is a side blog, and that it is still under construction.
It is said that J.K. Rowling was planning on making Dean Thomas and Seamus Finnigan a couple, but she ended up not doing it because she didn’t want to take too much attention away from the Trio. Therefor technically, yes, Deamus could be considered canon.