Which preposition to use with murderesses

of Occurrences 6%

The glaring speckled dragon, O Arkesilas, he slew by subtlety, and by her own aid he stole away Medea, the murderess of Pelias.

in Occurrences 3%

And now, for a few hours, the whole interest of our narrative centres in her whom that moment had so completely transformed and made already a murderess in heart and in purpose.

for Occurrences 1%

"Own a murderess for my wifenever!

Which preposition to use with  murderesses