No it is OK
or Yes it is OK
St Fiacre is in both canons - clearly 670 is before 1540 when those damned prots stopped making saints.
When Diana died, the Dean of Windsor did duty outside the Palace comforting and healing etc and someone warbled into a microphone:
" WAS she a saint ? " He the Dean had a few false starts also picked up by microphone muttering she was a protestant and saints hadnt been made for 500 y and even perhaps a 'what? while she was alive ?'
so perhaps it would be good if you asked if he wanted one
Protestants are a bit funny about images of saints and even funnier about praying to [dead] saints.