Which preposition to use with caradoc

in Occurrences 1%

WINIFRED, ST., a British maiden who was decapitated by Prince Caradoc in 650; where her head rolled off tradition says a spring instantly gushed forth, the famous Holywell in Flintshire; is represented in art carrying her head.

OF Occurrences 1%

CARADOC OF MEN'WYGENT, the younger bard of Gwenwyn prince of Powys-land.

Which preposition to use with  caradoc