Upvote:4
Directly from the Department of State
If your name has legally changed through marriage, divorce, or a court ordered name change, you will need to obtain a new passport. Once you have a new passport, the Department of State recommends that you apply for a new U.S. visa to make it easier for you to travel to and from the United States.
I changed my name. Is my US visa with my old name still valid
My take on it is that it is still valid however you may have problems like being stopped and taken to secondary inspection etc, basically an inconvenience.