The word "he" refers to Jesus Christ. The phrase "was declared" could be restated with an active verb. AT: "God declared him" (See: [[rc://en/ta/man/translate/figs-activepassive]])
AT: "God has graciously given me a gift. He has appointed me to be an apostle" or "God has given me the gracious gift of being an apostle" (See:[[rc://en/ta/man/translate/figs-hendiadys]]) (See: [[rc://en/ta/man/translate/figs-activepassive]])
## we ##
Here the word "we" refers to Paul and to the 12 apostles that followed Jesus but excludes the believers in the church in Rome. (See: [[rc://en/ta/man/translate/figs-exclusive]])
Paul uses the word "name" to refer to Jesus. AT: "in order to teach all nations to obey because of their faith in Him" (See: [[rc://en/ta/man/translate/figs-metonymy]])