| Brennan | D. | General Dealer | Perth | 1878 | Herald Almanack |
| Brennan | D. | General Dealer | Perth | 1879 | Herald Almanack |
| Brennan | D. | General Dealer | Perth | 1879 | WA Almanack |
| Brennan | D. | General Dealer | Perth | 1880 | Herald Almanack |
| Brennan | D. | Genral Dealer | Perth | 1880 | WA Almanack |
| Brennan | D. | General Dealer | Perth | 1881 | Herald Almanack |
| Brennan | D. | General Dealer | Perth | 1881 | WA Almanack |
| Brennan | D. | Butcher | Perth | 1882 | Herald Almanack |
| Brennan | D. | Landowner | Perth | 1882 | WA Almanack |
| Brennan | D. | House Proprietor | Perth | 1883 | Herald Almanack |
| Brennan | D. | Landowner | Perth | 1884 | WA Almanack |
| Brennan | D. | House proprietor | Perth | 1885 | Herald Almanack |
| Brennan | D. | | Roe Street, Perth | 1897 | Witton's Directory |
| Brennan | E | Wilmott & Co, Manager | Greenough | 1897 | Witton's Directory |
| Brennan | E. | Builder | Victoria District (Greenough) | 1880 | WA Almanack |
| Brennan | E. | Roadmaker | Victoria Districts (Greenough) | 1882 | WA Almanack |
| Brennan | E. | Storekeeper | Victoria District (Greenough) | 1886 | WA Almanack |
| Brennan | E. | Storekeeper | Greenough | 1887 | WA Almanack |
| Brennan | Edward | Trading as Willmott & Co, Storekeeper | Greenough | 1897 | Witton's Directory |
| Brennan | G. | Teamster | Busselton, Etc. (Augusta, Etc., Karridale, Boranup & Hamlin) | 1889 | WA Almanack |
| Brennan | G. B. | Farmer | Busselton, Etc. | 1887 | WA Almanack |
| Brennan | H. | Carter | Perth | 1882 | Herald Almanack |
| Brennan | J. | Farmer | Toodyay District (Newcastle) | 1879 | WA Almanack |
| Brennan | J. | Farmer and Grazier | Wellington District (Blackwood Road) | 1879 | WA Almanack |
| Brennan | J. | Slaughterman | Perth | 1882 | WA Almanack |
| Brennan | J. | Farmer | Busselton, Blackwood &c. (Augusta Saw Mill) | 1882 | WA Almanack |
| Brennan | J. | Messenger Tel. Dept | Perth | 1884 | Herald Almanack |
| Brennan | J. | Shoemaker | Newcastle & Toodyay District | 1884 | WA Almanack |
| Brennan | J. | Farmer | Busselton, Blackwood &c. (Augusta Saw Mill) | 1884 | WA Almanack |
| Brennan | J. | Messenger Telegraph Dept. | Perth | 1885 | Herald Almanack |
| Brennan | J. | Telegraph Department | Perth | 1886 | WA Almanack |
| Brennan | J. | Farmer | Albany Road (Williams River) | 1886 | WA Almanack |
| Brennan | J. | Telegraph Asst. | Eucla Telegraph Line (Eyre) | 1886 | WA Almanack |
| Brennan | J. | Telegraphist | Perth | 1887 | WA Almanack |
| Brennan | J. | Shoemaker | Newcastle | 1887 | WA Almanack |
| Brennan | J. | Telegraph Asst. | Eucla (Eyre) | 1887 | WA Almanack |
| Brennan | J. | Farmer | Williams River | 1887 | WA Almanack |
| Brennan | J. | Telegraphist | Perth | 1888 | WA Almanack |
| Brennan | J. | Farmer | Newcastle | 1888 | WA Almanack |
| Brennan | J. | Farmer | Albany Road(Williams River) | 1888 | WA Almanack |
| Brennan | J. | Telegraph Asst. (Eyre) | Eucla, Etc. | 1888 | WA Almanack |
| Brennan | J. | Telegraphist | Perth | 1889 | WA Almanack |
| Brennan | J. | Farmer | Newcastle | 1889 | WA Almanack |
| Brennan | J. | Farmer | Albany Road (Williams River) | 1889 | WA Almanack |
| Brennan | J. | Telegraph Assistant | Eucla, Etc (Eyre) | 1889 | WA Almanack |
| Brennan | J. | Stockman | Nannine | 1897 | Witton's Directory |
| Brennan | J. & T. | Farmer | Busselton | 1876 | WA Almanack |
| Brennan | J. C. | Hairdresser & Tobbacconist | High Street, Fremantle | 1897 | Witton's Directory |
| Brennan | James | Farmer | Newcastle & Toodyay District | 1880 | WA Almanack |
| Brennan | James | Dempster's Store | Newcastle & Toodyay District | 1882 | WA Almanack |
