| Pemberton | P. H. | Homestead, 458/74, Cunderdin | P3P | 1912 |
| Pemberton | P. H. | Homestead 458/74, Cunderdin | P3P | 1924 |
| Penberthy | A. | Blackheath, Wongan | WD0 | 1924 |
| Pendergrast | N. O. | Tarawera, Mt. Barker | 0NP | 1962 |
| Penfold | G. | Merryvale, Cowaramup | S3Y | 1962 |
| Pengilly | F. W. | Fairview, Kellerberrin | FP5 | 1924 |
| Penn | Alf | Mulugor Spring, Northampton | 4JJ | 1924 |
| Penn | Alfred | Mulloo Farm, Narra Tarra | AX3 | 1912 |
| Penn | Alfred | Mulloo Farm, Narra Tarra | AX3 | 1924 |
| Penn | E. J. & R. I. | Mullberry, Walebing | 6CB and 4D, 45E | 1962 |
| Penn | Geo. | Block 1353, Narra Tarra | GP5 | 1912 |
| Penn | Geo. | Block 1353, Narra Tarra | GP5 | 1924 |
| Penn | W. H. | Plantagenet 4912, Napier Creek, Via Albany | P2N and 39C, 29E | 1962 |
| Penn | Wm. Hy. | Williams Valley, Narrogin | W1P | 1912 |
| Penn | Wm. Hy. | Williams Valley, Narrogin | W1P | 1924 |
| Penna | Thomas | 77 Oxford Street, Leederville | 0PA | 1912 |
| Penna | Thos. | 77 Oxford Street, Leederville | 0PA | 1924 |
| Penney | J. | Morbelling Spring, Tammin | J8P | 1912 |
| Penney | J. | Marbelling Spring, Tammin | J8P | 1924 |
| Penninent | Jas. T. E. | Common, Collie | 6TO | 1924 |
| Pennington | Arthur S. | Follans, South Wandering Road, Pingelly | AP1 | 1926 |
| Pennington | C. & J. G. | Tatiara, Gilliminning | SP2 | 1912 |
| Pennington | C. & J. G. | Tatiara, Gilliminning | SP2 | 1924 |
| Pennington | H. C. | Hollingwood, Pingelly | H3P | 1912 |
| Pennington | H. C. | Hollingwood, Pingelly | H3P | 1924 |
| Pennington | R. | Coode Street Dairy, South Perth | RP7 | 1912 |
| Pennington | R. | Coode Street Dairy, South Perth | RP7 | 1924 |
| Pennington & Son | A. S. | Follans, West Pingelly | AP1 and 22B, 24A | 1962 |
| Penny | A. E. D. | Stirling Estate, Popanyinning | 3PA | 1912 |
| Penny | A. E. D. | Stirling Estate, Popanyinning | 3PA | 1924 |
| Penny | C. H. | Stirling Estate, Popanyinning | 3PA and 30B, 10E | 1962 |
| Penny | Chas. | Cowering, Greenhills | 2CP | 1912 |
| Penny | Chas. | Cowering, Greenhills | 2CP | 1924 |
| Penny | F. L. | Loc. 24, Boyunup | 0FP | 1962 |
| Penny | Francis W. | Kermerton Farm, Boyanup | 0PF | 1924 |
| Penny | H. C. | Korrawilla, Greenhills | 8HP and 32D, 34E | 1962 |
| Penny | H. jun. | Greenhills, Greenhills | 8HP | 1912 |
| Penny | H. junr. | Greenhills | 8HP | 1924 |
| Penny | Hubert | Cowering, Greenhills | H4P | 1912 |
| Penny | Hubert | Cowering, Greenhills | H4P | 1924 |
| Penny | J. T. | Dongerlocking, Popanying | JP0 | 1912 |
| Penny | J. T. | Dongerlocking, Popanyinning | JP0 | 1924 |
| Penny | Jas. | Dongarra | JP2 | 1912 |
| Penny | Jas. | Dongarra | JP2 | 1924 |
| Penny | W. F. (Jnr.) | Corner Wells, Maden Flats, Greenhills | 1WP and 33D, 41E | 1962 |
| Penny | Walter H. | Golden Valley, Greenhills | 5PW | 1912 |
| Penny | Walter H. | Golden Valley, Greenhills | 5PW | 1924 |
| Penny | Wm. Fredk. | Bally Bally, Greenhills | 1WP | 1912 |
| Penny | Wm. Fredk. | Bally Bally, Greenhills | 1WP | 1924 |
| Penny & Hill | - | Berrinup, Mt. Barker | 1PY | 1924 |
