| Cook | J. | | Stone Street, Perth | 1897 | Witton's Directory |
| Cook | J. | | Bellvue Terrace, Fremantle | 1897 | Witton's Directory |
| Cook | J. | Grocer | Mandurah Road, Fremantle | 1897 | Witton's Directory |
| Cook | J. | Lineman | Israelite Bay | 1897 | Witton's Directory |
| Cook | J. A. | | Mandurah Road, Fremantle | 1897 | Witton's Directory |
| Cook | J. A. | Carter | Mandurah Road, Beaconsfield | 1897 | Witton's Directory |
| Cook | J. C. | Katanning Hotel | Katanning | 1897 | Witton's Directory |
| Cook | J. H. | Carpenter | Bunbury | 1897 | Witton's Directory |
| Cook | J. P. | | Bellvue Terrace, Beaconsfield | 1897 | Witton's Directory |
| Cook | J. R. | | Northam | 1897 | Witton's Directory |
| Cook | J. T. | Miller & Farmer | Toodyay | 1877 | Herald Almanack |
| Cook | James | Teamster (D) | Victoria Plains & Dandaragan | 1882 | WA Almanack |
| Cook | James | Teamster (D) | Victoria Plains & Dandaragan | 1884 | WA Almanack |
| Cook | James | Water P.C. | Victoria District (Geraldton) | 1884 | WA Almanack |
| Cook | James | Stockman | Dandaragan | 1887 | WA Almanack |
| Cook | James | Stockman | Dandaragan | 1888 | WA Almanack |
| Cook | James | Stockman | Dandaragan | 1889 | WA Almanack |
| Cook | James | Stockman | Dandaragan | 1897 | Witton's Directory |
| Cook | James. | Teamster (D) | Victoria Plains & Dandaragan | 1881 | WA Almanack |
| Cook | Jas. | Hunter | Eucla | 1897 | Witton's Directory |
| Cook | Jno | Farmer & Grazier & Miller | Victoria Plains & Dandaragan | 1881 | Herald Almanack |
| Cook | Jno Jun. | Farmer & Grazier | Victoria Plains & Dandaragan | 1881 | Herald Almanack |
| Cook | Jno. | Farmer & Grazier | Victoria Plains & Dandaragan (D) | 1877 | Herald Almanack |
| Cook | Jno. | Farmer & Grazier | Victoria Plains | 1877 | WA Almanack |
| Cook | Jno. | Farmer & Grazier | Victoria Plains & Dandaragan (D) | 1878 | Herald Almanack |
| Cook | Jno. | Farmer & Grazier | Victoria Plains & Dandaragan | 1879 | Herald Almanack |
| Cook | Jno. | Farmer and Grazier (D) | Victoria Plains & Dandaragan | 1879 | WA Almanack |
| Cook | Jno. | Farmer & Grazier | Victoria Plains & Dandaragan | 1880 | Herald Almanack |
| Cook | Jno. | Farmer & Grazier | Victoria Plains & Dandaragan | 1882 | Herald Almanack |
| Cook | Jno. | Farmer & Grazier [D] | Victoria Plains, Dandaragan | 1883 | Herald Almanack |
| Cook | Jno. & Jno. Junr. | Farmers, Graziers | Victoria Plains, Dandaragan | 1884 | Herald Almanack |
| Cook | Jno. Jnr. | Farmer & Grazier | Victoria Plains & Dandaragan | 1879 | Herald Almanack |
| Cook | Jno. Junr. | Farmer & Grazier | Victoria Plains & Dandaragan | 1880 | Herald Almanack |
| Cook | Jno. Junr. | Farmer & Grazier | Victoria Plains & Dandaragan | 1882 | Herald Almanack |
| Cook | John | Farmer & Grazier | Geraldton | 1875 | Herald Almanack |
| Cook | John | Farmer & Grazier | Geradlton | 1875 | WA Almanack |
| Cook | John | Farmer & Grazier | Geraldton | 1876 | Herald Almanack |
| Cook | John | Farmer | Victoria Plains &c. | 1876 | WA Almanack |
| Cook | John | Farmer & Grazier | Victoria District (Champion Bay) | 1876 | WA Almanack |
| Cook | John | Farmer | Swan | 1879 | Herald Almanack |
| Cook | John | Farmer | Swan | 1880 | Herald Almanack |
| Cook | John | Farmer & Grazier (D) | Victoria Plains & Dandaragan | 1880 | WA Almanack |
| Cook | John | Farmer | Victoria District (Greenough) | 1880 | WA Almanack |
| Cook | John | Farmer | Swan | 1881 | Herald Almanack |
| Cook | John | Farmer | Swan | 1882 | Herald Almanack |
| Cook | John | Farmer & Grazier (D) | Victoria Plains & Dandaragan | 1882 | WA Almanack |
| Cook | John | Foreman | Eucla Telegraph Line (Thomas River) | 1882 | WA Almanack |
| Cook | John | Farmer | Swan | 1883 | Herald Almanack |
| Cook | John | Farmer | Swan | 1884 | Herald Almanack |
| Cook | John | Farmer & Grazier (D) | Victoria Plains & Dandaragan | 1884 | WA Almanack |