Kathia Sophia: Prince and Princess Michael of Britain's daughter's name is Lady Gabriella Windsor.
There are other royal families with Gabriellas, Gabrielles, and Gabriels
King Philippe and Queen Mathilde of Belgium have a son Gabriel (2003)
Carl of Austria (heir) has a sister Gabriela (1956)
their sister Monika has a son Gabriel Casanova y Habsburga-Lorena (1983)
cousin M Beatrix of Austria-Este has Gabrielle Riprand v Arco-Zinneberg (1992)
cousin Carl Christian of Austria + Astrid of Luxembourg have a Gabriella (1994)
Astrid's brother Jean's daughter is Marie Gabrielle of Nassau (1986)
Astrid/Jean's nephew Prince Louis of Luxembourg has a son Gabriel (2005)
Eric of Parma also has a Marie Gabrielle (1982)
There are two Maria Gabrielas in Brazil (1959) and her niece (1989)
In that branch Pedro of Brazil also has Gabriel (1980) who has a Gabriel (2013)
In the other branch Francisco of Brazil has a Gabriel (1989)