How Do I Change The Table Owner?

I have to make a copy of an existing database and call it something different. That part was easy because I simply backed it up and then restored it with a different name.

OrigDbName

Table1 Owner OrigDdName

Table2 Owner OrigDdName

But now I find that all the tables still have the original database name as the owner and I cannot refer to them programmatically unless I use the original database name.

NewDbName

Table1 Owner OrigDdName

Table2 Owner OrigDdName

So how do I change the owner of the tables to the new database name. What I really need is;

NewDbName

Table1 Owner NewDdName

Table2 Owner NewDdName

Please be as specific as possible because I am not a DBA and I am out of my depth once it gets beyond the basics of using commands like Alter Table.

Thank you.