Could i change from patricia on facebook to trisha is this possible and what do i do?

[Patricia]

[wartorious]

How do I change my name?

You can change your name or add an alternate name (ex: nickname or maiden name) to your account. To edit your name:
Review our name standards
Click in the upper-right corner of any Facebook page and select Account Settings
Click General in the left-hand column
Look for the Name setting and click Edit to the far right
Type in your name and save your changes
Keep in mind:
To help make sure that everyone uses their real name, we limit the number of times you can change your name.
If you weren't able to change your name, we may be able to help.