Trilby \t-ril-by, tr(i)-lby\ as a girl's name. Literary name coined in the early 20th century: Trilby was the main character of the eponymous novel and play who became a great singer. The name hence possibly refers to vocal trills. A trilby hat is also a soft felt hat with a dented crown.

Trilby has 6 variant forms: Trilbea, Trilbee, Trilbeigh, Trilbey, Trilbie and Trillby.