Prince and Princess
While the titles of nobility are quite common among men and women, it is less well known that the children of nobles are often dubbed prince and princess. Exception is for instance the count, there are the offspring hereditary counts and hereditary countess (or countess). In the case of dukes, landgraves, electors and simple princes, however, the child may magnificently describe itself as a prince / princess.
By the way, when buying a title of nobility, we also issue certificates for the children with these titles, you can simply order them in one step. Which it is in each case, stands in the description of course exactly in it.