From Shakespeare's "A Comedy of Errors." The twin brother of Antipholus of Ephesus and the son of Egeon; he has been traveling the world with his slave, Dromio of Syracuse, trying to find his long-lost brother and mother.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...