I likely have many, many connections. Honestly, throw a dart at my Character Directory and I bet you we can come up with something.

So more concrete, he could have been the one that turned Endy? Endy has no idea who did it and has never made any moves to find out so I don't know how fun that would be for you, though. XD He just needs plots tbh

Alexander Echelon was a Gryffindor in the year above him and would let him stay over at Grandmama Jena's all he wants. Until Grandmama kicks Alasdair out anyway. Alexander believes all his stories and doesn't grasp any inconsistencies because Alexander is a charming ditz.

Leonid Fisk and Desiderius Morgan were also in the year below him but Puffs. Desi has his own place in Wellingtonshire that Alasdair is welcome to crash at.