Dr E:Certainly he does
Calivn says very explicitly that there are babies in hell.
I'll take Calvin at his word...
"I everywhere teach that no one can be justly condemned and perish except on account of actual sin; and to say that the countless mortals taken from life while yet infants are precipitated from their mothers' arms into eternal death is a blasphemy to be universally detested."(Institutes, Book 4, p.335). "I do not doubt that the infants whom the Lord gathers together from this life are regenerated by a secret operation of the Holy Spirit." (Amsterdam edition of Calvin's works, 8:522).