Who is the Oliver of Oliver's Birthday piece for trumpet and piano and why was it composed?

"Oliver's Birthday" is a piece composed by American composer Eric Ewazen for Trumpet and piano. It was written as a celebration of the birthday of Oliver, the son of Ewazen's friend and colleague, and is intended to capture the joy and excitement of a child's birthday celebration. The piece features playful melodies and lively rhythms, reflecting the festive spirit of the occasion.