Is the baby wearing armour?
Or is the knight in a pram?
In some ways I've rather enjoyed all the mind-boggling, but eventually a writer of historical fiction really has to get this kind of thing sorted out.
If a baby is wearing armour (specifically, a helmet, probably with a visor) then it's a basinet or bascinet.
No baby was harmed during the making of this picture. He likes it in there. His name is Tommy.
If a knight has got a pram on his head, then it's a bassinet.
The basinet/bascinet is made of steel, and the bassinet is made of wickerwork or perhaps wood.
Though the other way round would probably be fine, too.
I think I've got it all sorted out, now.
Word To Use Today: bas/ss/scinet. All these words come from the French word bassin, which means basin. Barcelonnette means little cradle, and this word has got muddled up with the pram meaning, too.