Which preposition to use with gratiano

after Occurrences 1%

Bassanio, ashamed to appear so ungrateful, yielded, and sent Gratiano after Portia with the ring; and then the clerk Nerissa, who had also given Gratiano a ring, she begged his ring, and Gratiano (not choosing to be outdone in generosity by his lord) gave it to her.

in Occurrences 1%

Gratiano in excuse for his fault now said, "My lord Bassanio gave his ring away to the counsellor, and then the boy, his clerk, that took some pains in writing, he begged my ring.

Which preposition to use with  gratiano