Names
- North Park Railway Company.1
- North, Walter Harper, 1871-1952.1
- Northern Michigan Traction Company.1
- Ohio and Michigan Sand and Gravel Company.1
- Order of Patrick Henry.1
- Osborn, Chase S. (Chase Salmon), 1860-1
- Osborn, Chase S. (Chase Salmon), b. 18601
- Paris & Pere Marquette River Railroad Company.1
- Patton, George S. (George Smith), 1885-1945.1
- Peerless Portland Cement Company.1
- Pennington, Fred A.1
- Pennsylvania Railroad.1
- Penrod, John.1
- Penrod/Hiawatha Company.1
- Pere Marquette Line Steamers.1
- Pere Marquette Railway.1
- Pontiac, Oxford and Northern Railroad Company.1
- Port Huron and North Western Railway Company.1
- Protestant Reformed Churches of America.1
- Reid, Neil E., 1871-1