The following directories were at least partially checked.
| 1791-8 | Nothing found for Trevan or Watts | |||
| Camborne | Mrs Treven | Private resident | 1883 | Tehidy Rd |
| Camelford | Adolphus Trevan | Currier and Leather Cutter / private resident | 1873
1883 |
1883 - Fore St, Camelford |
| Camelford | Watts, Rd | Currier and Leather Cutter | 1830-1 | Adolphus Trevan, son of Ann nee Watts,
later became a Currier at Camelford |
| Padstow | Henry Trevan | Magistrates | 1878 | |
| Padstow | Matthew Trevan | Surgeon / private resident | 1830-1
1844 1852-3 1856 1873 1878 |
1856 onwards address given as Church Street |
| Port Isaac | Frederick Trevan | Surgeon | 1852-3
1856 1873 1878 1883 |
sometimes shown as Port Isaac, Wadebridge RSO |
| St Mabben | John Trevein | Carriers | 1832 | from the New London Inn, every Sat |
| West Looe, Liskeard | Isaac Trevan | Private resident | 1873
1883 |
Darloe Cottage |
| 17 Addison Rd | Plymouth | John Trevan
(father or son) |
Clerk of Works | 1893 | See also Alderney Ter |
| 14 Alderney Ter | Plymouth | John Trevan
(father or son) |
Clerk of Works | 1895-8 | See also Addison Rd |
| 4 Charles Place | Plymouth | Octavia Trevin | Lodging House Keeper | 1862 | See also Jubilee House |
| 11 Chapel St | Plymouth | Caroline Trevan | Beer retailer | 1862 | |
| 4 Devonshire St | Mrs Grace Trevan | 1897-9 | |||
| 14 Flora St | Plymouth | Wm Trevan | Butcher | 1893-9 | My great-grandfather |
| 26 Frederick St East | Plymouth | H(eny) M(iers) Trevan (j) | Shipwright | 1885-98 | My great-great-grandfather |
| 17 Gibbons St | John Trevan
(father or son) |
Clerk of Works | 1890 | ||
| Gloucester St | Devonport | John Trevan | Carpenter & Joiner | 1844 | My great-great-great-grandfather |
| Jubilee House, Jubilee St | Plymouth | Octavius Teevan | Residential | 1852 | See also Charles Place |
| Old Laira Rd, 1 Gordon Terr, YMCA Rooms | Plymouth | John Wm Trevan | Pensioner | 1897-9 | See also Victoria Cottages |
| 18 Seymour Ave West | Plymouth | John Trevan
(father or son) |
Residential | 1896-9 | |
| 38 Tracy St | Plymouth | Saml Lorenzo Smith Trevan | Builder | 1893-8 | Chris Trevan's great-uncle |
| 120 Union St | East Stonehouse | Wm Trevin | Jeweller & watchmaker | 1890 | |
| Victoria Cottages, Laira | Plymouth | John Trevan | Residential | 1895-6 | See also Old Laira Rd |