Kevin Swanson

From Family Guy - Wiki on Neoseeker

Kevin Swanson is the 15-year old son of Bonnie and Joe Swanson. He gets his looks from his father. When he is not working at the gas-station he is usually listening to music. Meg likes Kevin a lot but whenever they get near each other something always happens to interrupt them.

In season seven, after the Swanson's have a daughter, Peter consults Joe about Kevin's absence. Joe then tells Peter he was killed in Iraq.