- Taaffe, George Joseph
- Talbot, Col. Hon. Milo George
- Talbot, Hon. Reginald Gilbert Murray
- Talbot, William John
- Talbot of Malahide, Baron
- Tamplin, Lieut.-Col. Robert James Abbott
- Tate, Major Sir Robert William
- Tatlow, Joseph
- Taylor, Capt. Edward Richard
- Taylor, Col. Sir William
- Teeling, Luke Alexander
- Teggart, Frederick John
- Teignmouth, Baroness
- Templemore, Baron
- Templetown, Viscount
- Tenison, Col. William
- Tennant, Elizabeth A.
- Thomas-O'Donel, Edwin
- Thompson, Professor D'Arcy Wentworth
- Thompson, Edward Charles
- Thompson, Major-Gen. Sir Harry Neville
- Thompson, Herbert Marshall
- Thompson, Sir William John
- Thompson, Lady, Margaret Dalrymple
- Thomson, George
- Thrift, William Edward
- Thunder, Lieut.-Col. Stuart Herman Joseph
- Tighe, Capt. Thomas
- Tivy, Henry Lawrence
- Toler, Otway Scarlett Graham
- Tollemache, Arthur Frederick Churchill
- Tomkin, Rev. Nicholas James
- Toner, Rev. Patrick Joseph
- Toomey, William
- Torney, Henry Charles Stanley
- Tottenham, Charles Gore
- Tottenham, Major Charles Robert Worsley
- Townsend, Lady
- Townshend, William Tower
- Traill, Lt.-Col. William Stewart
- Tredennick, Major-Gen. James Richard Knox
- Trench, Lady Anne
- Trench, Hon. Cosby Godolphin
- Trench, Hon. Dudley Oliver
- Trench, Col. Frederick Amelius Le Poer
- Trench, Hon. Grace Mary
- Trench, Hon. Greville Sydney Rochfort Le Poer
- Trench, Lady Katherine Anne Le Poer
- Trench, Hon. Power Edward Ford Le Poer
- Trench, Hon. Richard John Le Poer
- Trench, Hon. Robert Power
- Trench, Hon. Roderic Charles Berkeley Le Poer
- Trench, Wilbraham Fitzjohn
- Trench, Hon. William Francis Brinsley Le Poer
- Trench, Hon. William Cosby
- Trimble, Col. Charles Joseph
- Trimlestown, Baron
- Tuam, Lord Bishop of
- Tuam, Killala And Achonry, Bishop of
- Tuite, Henry Maurice
- Tuite, Capt. Thomas Mark Hardress Stratford
- Turnly, Francis John Seymour
- Tweedy, Ernest Hastings
- Tynan, Katharine (Mrs. Katharine Tynan Hinkson)
- Tyrone, Earl of