Who was considered with Matthias to replace the apostle Judas?
You will find your answer in Acts 1:23.
Acts 1:14-26 detail the account of Matthias being appointed as an apostle to replace Judas Iscariot, but he never actually became an apostle, because the Lord never chose him, Peter did. Apostle Paul was the one ordained by Jesus Christ to replace Judas. Galatians 1:1 - "Paul, an apostle, (not of men, neither by man, but by Jesus Christ, and God the Father, who raised him from the dead;)"