[Grove Music Online]: The widely disseminated motet Jerusalem luge (surviving in well over 20 sources, and also intabulated for lute), is probably not by Caen, despite a number of attributions to him. Attribution to Richafort in 1532(9) and 10 other sources, attribution to Lupus in 1534(10) and 2 Italian manuscripts, attribution to Caen in 1559(1) and three late German sources; probably by Lupus

V-CVbav-ms-Capp.Giulia.XII,4: Composer name in ms (index) = 'Lup[us]' / Composer name in ms = 'Lupus'