Is Emmanuel a common/popular name in Belgium?
It seems rather old-fashioned to me...
It doesn't appear to be, but then you wouldn't expect royalty to give their children trendy names.
In 2003 the popular names for boys in Belgium were:
Thomas, Lucas, Noah, Nathan, Maxime, Hugo, Louis, Arthur, Robbe, Nicholas, Simon, Alexandre, Romain, Tom, Mohamed, Théo, Robin, Antoine, Milan, Wout, Senne, Luca, Victor, Jonas, Jelle.
For girls the most popular names in 2003 were: Emma, Laura, Marie, Julie, Sarah, Manon, Léa, Luna, Lisa, Charlotte, Camille, Louise, Amber, Clara, Lotte, Emilie, Elise, Chloé, Océane, Eva, Jana, Pauline, Britt, Lara, Femke.
No Elisabeth, Gabriel, or Emmanuel anywhere on that list. I think I like the royal names better than the ones that are trendy in Belgium however.