AutoCAD Civil 3D objects use a name template to specify the object name.
A name template is a default name format that can be incremented for each new object of that type.
For example, when you create an alignment, you will see Alignment - (<[Next Counter(CP)]>) in the Create Alignment dialog box. This is a name template. This default template will use the word “Alignment” and then follow it with the next available number (the next counter), each time you create a new alignment. For example, “Alignment - 1”, “Alignment - 2”, and so on.
Next to the object name field, you can click 
to display the Name Template dialog box, where you can set up the default format you want to use.
Or, you can specify a name manually by clearing the name template format from the object name field, and then typing a new name.
Object names are displayed in Toolspace. You can edit the object names by changing the object properties.
Naming Constraints for Objects and Styles
Object and style names restrict the use of certain characters.
When naming an object or style, do not use the following characters:
- < (less than)
- > (greater than)
- / (forward slash)
- \ (backward slash)
- + (plus sign)
- “ (double quotes)
- : (colon)
- ; (semi colon)
- = (equals)
- | (vertical line)
- , (comma)
- * (asterisk)
- ? (question mark)
- ‘ (single quote)