- Milwaukee Building Co1
- Morrison, Lloyd E2
- Morrison, Rachel Lopes2
- Mote, M2
- Mundorff, Howard F1
- Murphy, E. R1
- Neil, James W1
- Neumeister, John G1
- Pacific Fire Extinguisher Co1
- Pacific Mfg. Co1
- Pacific Southwest Trust & Savings Bank1
- Palmer, Frank L1
- Palmer, Thomas1
- Parkinson and Bergstrom1
- Parkinson, John, 1861-19351
- Pasadena Hospital Association1
- Pasadena Ice Company7
- Pasadena Security Investment Company1
- Phillips, John B. (John Bakewell)1
- Pitcairn, Robert1
- Pomona Valley Ice Company1
- Poole, John H2
- Porter, L. G1
- Porter, Marion A1
- Postle & Waddingham1
- Pratt, Charles M1
- Prentiss, Francis F7
- Procter, H. T1
- Ranney, Mary L1
- Rasey, Rose J1
- Reeve, Jennie A3
- Rice, Paran F1
- Richards, William1
- Roberts, W. H1
- Robinson, L. A4
- Rowland, Francis F1
- Rust, Edward H1
- Sanborn, Samuel P3
- Savage, Arthur1
- Schulz, J1
- Scofield, Belle D1
- Serrurier, Iwan2
- Silent, Charles1
- Smith, Datus C1
- Smith, Ernest W1
- Smith, Thomas P1
- South Pasadena Realty and Improvement Co2
- Spalding, Keith1
- Spinks, Margaret B. S. Clapham2
- Spinks, William Ward2
- Stimson, G. Lawrence1
- Stoddard, Charles H1
- Strasburg, Estelle1
- Swan, James1
- Thorsen, William R2
- Tichenor, Adelaide M2
- Tomkins, William B1
- Townsend, V. Ray1
- Valentine, W. D1
- Van Rossem, Josephine4