en_tn/act/09/15.md

he is a chosen instrument of mine

"chosen instrument" refers to something that is set apart for service. Alternate translation: "I have chosen him to serve me" (See: rc://en/ta/man/translate/figs-metonymy)

to carry my name

This is an expression for identifying or speaking out for Jesus. Alternate translation: "in order that he might speak about me" (See: rc://en/ta/man/translate/figs-metonymy)