| Brennan | P. | Shoemaker | Toodyay | 1877 | WA Almanack |
| Brennan | P. | Farmer & Grazier | Blackwood, Warren & Bridgetown | 1878 | Herald Almanack |
| Brennan | P. | Shoemaker | Toodyay | 1879 | WA Almanack |
| Brennan | P. | Bootmaker | Toodyay | 1882 | Herald Almanack |
| Brennan | P. | Farmer | Busselton, Blackwood &c. (Augusta Saw Mill) | 1882 | WA Almanack |
| Brennan | P. | Farmer | Wellington District (Blackwood (Including Bridgetown) & Warren) (Blackwood River) (Augusta) | 1882 | WA Almanack |
| Brennan | P. | Bootmaker | Toodyay | 1884 | Herald Almanack |
| Brennan | P. | Shoemaker | Newcastle & Toodyay District | 1884 | WA Almanack |
| Brennan | P. | Farmer | Busselton, Blackwood &c. (Augusta Saw Mill) | 1884 | WA Almanack |
| Brennan | P. | Farmer & Grazier | Wellington District (Blackwood River) (Augusta) | 1884 | WA Almanack |
| Brennan | P. | Farmer | Sussex (Busselton) | 1886 | WA Almanack |
| Brennan | P. | Farmerand Grazier | Wellington District (Blackwood River) | 1886 | WA Almanack |
| Brennan | P. | Bootmaker | Toodyay | 1886 | WA Almanack |
| Brennan | p. | Shoemaker | Newcastle | 1887 | WA Almanack |
| Brennan | P. | Farmer and Grazier | Blackwood River (Augusta) | 1887 | WA Almanack |
| Brennan | P. | Farmer | Busselton, Etc. | 1887 | WA Almanack |
| Brennan | P. | Farmer | Newcastle | 1888 | WA Almanack |
| Brennan | P. | Frmr and Grzr (Augusta) | Bunbury (Blackwood River) | 1888 | WA Almanack |
| Brennan | P. | Farmer | Busselton(Augusta) | 1888 | WA Almanack |
| Brennan | P. | Farmer | Newcastle | 1889 | WA Almanack |
| Brennan | P. jnr. | Teamster | Busselton, Etc. (Augusta, Etc., Karridale, Boranup & Hamlin) | 1889 | WA Almanack |
| Brennan | P. Senr. | - | Outlying Settlers (Port Augusta) | 1882 | Herald Almanack |
| Brennan | Patrick | Farmer | Newcastle & Toodyay District | 1880 | WA Almanack |
| Brennan | Patrick | Farmer | Newcastle & Toodyay District | 1881 | WA Almanack |
| Brennan | Patrick | Shoemaker | Newcastle & Toodyay District | 1882 | WA Almanack |
| Brennan | Patrick | | Northam | 1897 | Witton's Directory |
| Brennan | Peter | Farmer (Augusta) | Wellington District (Blackwood Road) | 1879 | WA Almanack |
| Brennan | Peter | Farmer | Wellington (Blackwood Road) (Augusta) | 1880 | WA Almanack |
| Brennan | Peter sen. | Farmer | Busselton, Etc. (Augusta, Etc., Karridale, Boranup & Hamlin) | 1889 | WA Almanack |
| Brennan | Peter. | Farmer | Wellington District (Blackwood River) (Augusta) | 1881 | WA Almanack |
| Brennan | S. | Storekeeper | Walkaway | 1897 | Witton's Directory |
| Brennan | T, | Farmer | Busselton, Etc. | 1887 | WA Almanack |
| Brennan | T. | Farmer | Newtown | 1879 | Herald Almanack |
| Brennan | T. | Farmer and Grazier | Wellington District (Blackwood Road) | 1879 | WA Almanack |
| Brennan | T. | Farmer | Newtown | 1880 | Herald Almanack |
| Brennan | T. | Farmer | Newtown | 1881 | Herald Almanack |
| Brennan | T. | Farmer | Vasse District | 1882 | Herald Almanack |
| Brennan | T. | Farmer | Newton | 1884 | Herald Almanack |
| Brennan | Thomas | Farmer | Busselton, Blackwood, &c. | 1880 | WA Almanack |
| Brennan | Thomas | Teamster | Busselton, Blackwood &c. (Augusta Saw Mill) | 1882 | WA Almanack |
| Brennan | Thomas | Teamster | Busselton, Blackwood &c. (Augusta Saw Mill) | 1884 | WA Almanack |
| Brennan | Thomas | Farmer | Busselton (New Town) | 1888 | WA Almanack |
| Brennan | Thomas. | Farmer | Busselton, Blackwood &c. | 1881 | WA Almanack |
| Brennan | Thos. | Farmer | Sussex (Busselton) | 1886 | WA Almanack |
| Brennan | Thos. | Farmer | Busselton, Etc. (Augusta, Etc., Karridale, Boranup & Hamlin) | 1889 | WA Almanack |
| Brennan | Thos. | Farmer | Lower Blackwood | 1897 | Witton's Directory |
| Brennan | W. | Telegraphist (Eucla) | Eucla Telegraph Line (Eucla) | 1879 | WA Almanack |
| Brennan | W. | Telgrphst. | Eucla Telegraph Line | 1880 | WA Almanack |
| Brennan | W. | Telegraphist | Eucla Telegraph Line (Eucla) | 1881 | WA Almanack |
| Brennan | W. | Telegraphist | Eucla Telegraph Line (Eucla) | 1882 | WA Almanack |
