Crossword Puzzle ''Unknown'' surname

Clue: ''Unknown'' surname

Alma mater of the 39th Pres. (USNA with 4 letters)
It equals 0.3937 inch (CENTIMETER with 10 letters)
Favorite Hall of Famer of the 39th U.S. president? (GARYCARTER with 10 letters)
Super Bowl to be played in the year 3968, at the current rate (MMII with 4 letters)
39th of 50 (NORTHDAKOTA with 11 letters)
39th president of the United States (JIMMYCARTER with 11 letters)
39th VP (AGNEW with 5 letters)
39th vice president (AGNEW with 5 letters)
39th Veep (AGNEW with 5 letters)
39th V.P. (AGNEW with 5 letters)