In this Indian name, the name Krishnan is a patronymic, not a family name, and the person should be referred to by the given name, Trisha.Trisha Krishnan, known mononymously as Trisha, is an Indian film actress and model, who primarily works in the South Indian film industries, where she has established herself as a leading actress. She was noticed after winning several beauty pageants like the Miss Madras contest (1999), which marked her entry into filmdom.