Question about singular names
In the batch M32J-39P in the United States Muster Rolls and Rosters project, there are many singular names listed, for example, the entries 9-13 in the Privates list. In the project directions the instructions are to list a name in the given names field if you cannot determine if a name is a given name or a surname. My guess is that in each entry with only one name entered, the name entered would be a surname, though no written indication is given.
Is there any information to the contrary regarding singular names? Thank you in advance for any assistance.