1457 – 1497; d. 9-14 Oct. 1497) was a Franco-Flemish singer and composer of the Renaissance, probably active only in his homeland, the southern part of the Netherlands.
He first appears in the records there in 1457, when he was brought in as a singer at the Illustrious Brotherhood of Our Blessed Lady (Illustre Lieve Vrouwe Broederschap).
Among his duties was recruiting new singers from other cities; a trip to Cambrai and Antwerp is documented during which he sought to find new members for the choir.
The accounts of the Brotherhood record his death between 9 and 14 October 1497, and in 1498 Matthaeus Pipelare took over his duties as choirmaster.
[1] Only one work is known to be by Nycasius with reasonable certainty, a Credo Vilayge, which exists in multiple sources, although even this attribution has been questioned.