What is "egardus"

Egardus, alternatively Engardus or Johannes Echgaerd, was a European composer of music in the late fourteenth and early fifteenth centuries. Almost no information survives about his life, and only three of his works are known. A certain "Johannes Ecghaerd", who held chaplaincies in Bruges and Diksmuide, may be a possible match for Egardus. The extant works—a canon and two Glorias—appear to be less complex than music by mid-century composers, possibly because they date from either very early or very late in Egardus' career.