Theodore I, Marquess of Montferrat (c. 1291–1338), Marquess of Montferrat in 1306–1338
Theodore Roosevelt | Charles Cornwallis, 1st Marquess Cornwallis | Theodore Dreiser | Robert Gascoyne-Cecil, 3rd Marquess of Salisbury | Marquess | Theodore Sturgeon | Montferrat | Francis Rawdon-Hastings, 1st Marquess of Hastings | Theodore von Kármán | Richard Wellesley, 1st Marquess Wellesley | Marquess of Bute | Wills Hill, 1st Marquess of Downshire | Theodore Roosevelt, Jr. | James Broun-Ramsay, 1st Marquess of Dalhousie | David Cecil, 6th Marquess of Exeter | Theodore Parker | Theodore Bikel | Theodore | Robert Grosvenor, 1st Marquess of Westminster | Henry Paget, 1st Marquess of Anglesey | Frederick Hervey, 8th Marquess of Bristol | Frederick Hamilton-Temple-Blackwood, 1st Marquess of Dufferin and Ava | Victor Hervey, 6th Marquess of Bristol | Theodore Roosevelt National Wildlife Refuge Complex | Théodore Botrel | Robert Wynn Carrington, 1st Marquess of Lincolnshire | Marquess of Rockingham | Marquess of Lansdowne | marquess | John Neville, 1st Marquess of Montagu |
These excavations permitted to ascertain that the martyr Valentine was not buried into the catacomb, but directly into a pit outside it; on this subdial grave Pope Jiulius I (336–352) built a former basilical structure, which was modified and enlarged by popes Honorius I (625–638) and Theodore I (642–649) and further restored in the following centuries until the last works carried out by Pope Nicholas II in mid-11th century.
Yolande Palaiologina or Violant (Moncalvo, June 1318 – Chambery, December 24, 1342) was the daughter of Theodore I, Marquess of Montferrat and Argentina Spinola, a Genoese lady, daughter of Opicino Spinola.