I think that Katherine MacDougal may not be considered as a canonical character because on the repartition it is said that Morag MacDougal is just after Neville Longbottom. But Katherine is alphabetically classed before Morag and so must be see the Hat beetween Neville and Morag this is not the case in the book. 188.8.131.52 15:18, October 7, 2009 (UTC)
Every other student from either the Harry Potter and Me note page or "The Original Forty" with the same surname as a student in the final novels is assumed to be the same character as their finalized counterparts. I fail to see what makes Isobel/Morag the exception. Seems like a cut and dry merge to me. -- 1337star (Drop me a line!) 19:56, December 10, 2014 (UTC)
Exactly my point. I definitevely agree with you. It is assumed that Gary Thomas is Dean Thomas, Trevor Boot is Terry Boot, Madhari and Mati Patel are Padma and Calì Patil. It would be ridicolous that Morag isn't Isobel.