Work with a Realtor. He or she has access to property data.
There are some websites that have the owner's name, you probably have to join and pay.
Or go to The Office of Assessor, owner's names are public records.
How do I find out the name of the owner of a particular property?
The Office of Assessor maintains the property assessment roll, which lists the assessee (normally the property owner). The roll may be inspected by the public at the main office or regional offices.