WB: What does Laufey believe happened to his son? — Nominator, we're not sure we understand this tag - could you clarify what it covers, please?

Not the nominator but in the Thor movies Loki is taken from Jotunheim as a baby, and it's never expanded upon what his birth father (Laufey) and the other Frost Giants actually know happened to him. Like, do they know Prince Loki of Asgard is their stolen prince? Do they think the baby died? What do they think of everything that happened?