Romanus Eustachius 
Last updated: 02.04.23
According to the Internet source given below, Romanus Eustachius [Eustachio Romano] was an Italian composer.
He is known for the one volume of his, Musica duorum (Rome, 1521) where he is titled as "Eustachius de Macionibus Romanus". His importance is that he is the first known composer of instrumental duets in the style of Josquin des Préz and his contemporaries.

Websites:
url15.gif Eustachio Romano Brief biography by oxfordindex.oup.com  
Recorder Sheet Music
18518209.gif18 Pieces in Two Parts (D(T)/A(B))smp_logo_88_white.gif
Score.
Publisher: Pelikan (PEL0869)