Sure you can. When I worked at a large non-profit we had a name change request from our affiliate members for a user named "Jack." That's right. Just Jack. He s

Sure you can. When I worked at a large non-profit we had a name change request from our affiliate members for a user named "Jack." That's right. Just Jack. He said that was his legal name. In Active Directory or LDAP, names (or lack of) are just attributes. So I just put 'First Name: Jack' and give him 'jack' as his username.