1.what is the difference between name and common name?
2.what is standard and default orientation?
#2, the best I can find: Re: Reorientation of the coordinate point xyz planes
Standard orientation is based on config option Orientation
Default Orientation is user defined and can modify from View manager > Orient > Default Orientation
Regarding standard and default orientation:
Usually the Standard and Default are the same orientation. But you have the ability to redefine the Default Orientation, via the View Manager, to a different orientation, if desired. Redefine is grayed out for Standard Orientation.
After activating the Standard Orientation, you can Spin/Pan/Zoom to a different orientation. Then RMB on the Standard Orientation, you will see that ONLY Save is available. When you try to save the new orientation, Creo will prompt you to save it to a new name. A new orientation will be created, but Standard Orientation will remain as it was.