Bill Hasler told reporters Tuesday at a news conference in the Detroit suburb of Belleville that Brad Hasler was killed.
Five of the seven victims were from Michigan. Their identities haven't officially been released.
The Boeing 747-400 was operated by National Air Cargo and crashed just after takeoff Monday from Bagram Air Base. The crew members were all American citizens.
The flight was destined for Dubai in the United Arab Emirates.
The plane was owned by Florida-based National Airlines, a subsidiary of National Air Cargo. It was carrying vehicles and other cargo.
National Airlines was based until recently at Michigan's Willow Run Airport, west of Detroit.