Leonel Power (also spelled Lionel, Lyonel, Leonellus, Leonelle; Polbero[1]), c. 1380–1445, was an English composer of the early Renaissance.
[2][3] Mainly a composer of motets and of sections of the Mass, he is the best-represented contributor in the Old Hall Manuscript.
The duke died in 1421; the next reference to Power is from 1423: on 14 May he joined the fraternity of Christ Church, Canterbury.
[1] While Power's output was slightly less than Dunstaple's (only 40 extant pieces can be definitely attributed to him), his influence was similar.
[citation needed] Power was one of the first composers to set separate movements of the Ordinary of the Mass which were thematically unified and intended for contiguous performance.