Born 18 November 1936 in Kaunas. Died 27 04 2013 in Vilnius.
Graduated from Vilnius University in 1959, graduated as a philologist and teacher of Lithuanian language and literature. He worked at the Ministry of Higher and Special Secondary Education, and from 1974 he taught at Vilnius University. The focus of Trimonis's criticism was the poetry of the Soviet period. He regularly published his research, critical articles and reviews in the cultural and social press of the time.