It is perfectly fine to choose a 'Venerable' or 'Blessed' for Confirmation. In fact, the current trend is to simply stick with your Baptismal name. In some of the more 'progressive' dioceses, one may also use an invented name. When I taught the confirmandi in one of those parishes, I insisted they pick the name of a saint (or veneralbe or blessed), write a report and share it with their classmates. In doing their research, some chose saints from the first centuries. It was beautiful to hear those names called out at Confirmation, a reminder to all present of these witnesses to the faith.
That is exactly what KV and I were assigned to do, research and write a report then share it and turn it in to Father.
KV chose Santo Nino Ancho who is considered the Lordes Child of Spain (I think it was).
His choice has a great fabled history as it were.
KV has a love of Hispanic/Spanish culture the language ect.
He would not favor among many here on this forum as he looks more at the humanity of the poor then the crime rate of those here illegally. Or something like that.
I kept all our Catichism work/study in the nap sack we use to pack in every week and BOY the Luau we had pig and all for our Confirmation party was a wonderful event. Pig and all!