Aleyn (fl. c. 1400) was an English composer. Two of his works survive in the Old Hall Manuscript, one a Gloria (no. 8), the other a Sarum Agnus Dei discant (no. 3, Old Hall, no. 128), later scratched out, which is ascribed to W. Aleyn. If this inscription is correct, the conflation of this composer and Johannes Alanus, who wrote Sub Arturo Plebs, is incorrect. David Fallows ascribed this Agnus to W. Typp, however it seems that he was mistaken. References Margaret Bent. "Aleyn", Grove Music Online, ed. L. Macy (accessed May 20, 2006), grovemusic.com (subscription access). Notes 15th-century composers Year of death unknown Year of birth unknown English male classical composers 14th-century composers Medieval male composers