Pets vs Thornmail Interaction

Anyone know the interaction between Thornmail procs and pets like Tibbers, Voidlings, Zyra plants, Daisy, Children of the Grave from Mordekaiser ult, Yorick ghouls and the Maiden of the Mist, and Shaco boxes? I know for sure that Thornmail doesn't proc on Shaco boxes because and I doubt that it works on Zyra plants either since they both deal magic damage, kind of implying that they aren't attacking through "conventional auto-attacks." And I understand that the Maiden of the Mist wouldn't proc Thornmail since she isn't really auto-attacking enemy targets.

And another question that's somewhat related; do Azir soldiers proc Thornmail? I have some reasons to believe it works the same way against Thornmail as Zyra plants and Shaco boxes.

Thanks a bunch frens <3