This refers to Jesus. Possible meanings are 1) "the one who gives people eternal life" or 2) "the ruler of life" or 3) "the founder of life" or 4) "the one who leads people to life"
This word, "Now," shifts the audiences' attention to the lame man.
# by faith in his name
Here the word "name" refers to Jesus. Possible meanings are 1) "because this man believes in Jesus" or 2) "because John and I believe in Jesus" (See: [[rc://en/ta/man/translate/figs-metonymy]])