Although you can create a Beneficiary with just a single name (which the system assumes is a last name), when you subsequently edit the Beneficiary properties you can't save it with just a First or Last name. For example, if you created a beneficiary by typing "John" into the Beneficiary field of an asset, the system creates a Beneficiary with a Last Name "John". If you then go to the View tab and try to edit the properties of this Beneficiary, the OK button won't enable until there is both a First and Last name. Because of this restriction you can't move "John" from the Last Name to the First Name field.