Ghanadan was previously identified by family members as a Realtor who was onboard the flight as part of a work-related trip. The plane was registered to a San Francisco Real Estate Company.
The plane crashed in the parking lot of a Staples office supply store in the 3800 block of Bristol Street, according to Stephen Concialdi, spokesman for the fire authority.
The victims include Navid Hakimi, 32, of Los Angeles; Floria Hakimi, 62, of Danville; Nasim Ghanadan, 29, of Alamo; Scott Shepherd, 53, and Lara Shepherd, 42, both of Diablo, according to the Orange County Coroner.
Shortly after declaring an emergency on Sunday afternoon the plane suddenly nosedived into the parking lot.
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Orange County Fire Authority Captain Steve Concialdi says the Cessna was heading to the airport when it came down and struck an empty parked vehicle in the lot of a Staples store. A auto can be seen parked mere meters from the wreckage.
The plane also hit a auto (pictured), but no one was reported injured.
The incident reportedly occurred at around 12.30pm on Sunday.