When talking about the deceased artist Cy Twombly, it is pronounced:
SIGH TWOM-blee. (Twom as in Tom with a W in the middle).
This is how he himself said his name, as documented in TV interviews.
Gene Twombly's birth name is Eugene Twombly.
Twombly - cyclecar - ended in 1915.
Twombly - cyclecar - was created in 1913.
Babe Twombly died in 1974.
Babe Twombly was born in 1896.
Carol Twombly was born in 1959.
Cy Twombly was born on 1928-04-25.
Kris Lev-Twombly was born in 1972.
Cy Twombly - baseball - was born in 1897.
Cy Twombly - baseball - died in 1974.
George Twombly died on 1975-02-17.
George Twombly was born on 1892-06-04.