According to the Grand-Ducale Instagram Stephanie has given birth to a son. His name is Charles Jean Philippe Joseph Marie Guillaume.
Lovely name--I was right about Marie being in there! Philippe is obviously for his maternal grandfather but it has me wondering if we'll get a Belgian godparent. Elisabeth would be a nice pick but I think the custom is only two, so I'm guessing it will be Felix and either of Stephanie's sisters, Nathalie or Isabelle, or Alexandra and one of Stephanie's brothers.
Congratulations to the family! Hoping all goes well with Steph post-delivery!