Claimants
- Taaffe
- Taite
- Talbot
- Talbot Ponsonby
- Tallon
- Talmage
- Tams
- Tancred
- Tanner
- Tansey
- Taplin
- Tarrant
- Tatlow
- Tavernier
- Taylor
- Taylor Hamerton
- Teff
- Tegan
- Telford
- Tench
- Tenison Collins
- Tennant
- Tew
- Therry
- Thomas Crawford
- Thompson
- Thomson
- Thomson Dunning
- Thornton
- Thorpe
- Thorton Skilbeck
- Thuillier
- Thunder
- Tickell
- Tierney
- Tighe
- Till
- Tillbrook
- Tiller
- Timmins
- Timoney
- Tinsley
- Tisdall
- Toal
- Tobin
- Todd
- Toffoli
- Toler Kingsley Tarpey
- Tomlinson
- Toner
- Toolan
- Toole
- Tormay
- Tormey
- Towell
- Towers
- Townley
- Tracey
- Tracy
- Traynor
- Treherne Webb
- Trench
- Trimble
- Trinder
- Triston
- Trocke
- Troughton
- Trumbull
- Tucker
- Tughan
- Tuke
- Tully
- Tuohey
- Tuohy
- Turbett
- Turner
- Tutty
- Twomey
- Tyghe
- Tyler
- Tynan
- Tynan O'Mahony
- Tyndall
- Tyrell
- Tyrer
- Tyrrell
- Tyson