What all do we know about Trolls?

I'm making a DnD campaign based around League for my friends and I, and one of them wanted some kind of Troll/Half Troll race. What do we know about Trolls in LoL? I know everything that's said in Trundle's lore, but are there any other references to them?

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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