How to list a Three part name on i-9 from Perm Resident card?

One of our employees insists that we have his name backwards in the payroll. There are three parts to the name. I dont want to give his name here so I'll use a psudonym. Albert Jefferson Moran. We have him listed Moran as his last name. He insists it's Jefferson. Now, according to his permement resident card... his given name is Albert and Surname: Jefferman Moran. Of course I want to go by the name that the US government has listed. So going by his Perm Resident Card, should his last name be Moran. Or Jefferson Moran? OR are the names reversed and he's correct that it should be Moran Jefferson? I would think he'd know his own name.

I hope that wasn't too confusing. I even E-verified him using Moran as the last name and he came back as authorized to work.