Didier Lupi Second (c.1520-after 1559) was a French composer, likely of Italian origin, based in Lyons.
In 1548 he published Chansons Spirituelles with the poet Guéroult, the first such important publication of its kind by a Protestant.
It includes Susanne un jour, a composition which was arranged by many later composers.
He also published collections of psalms, secular chansons and other works.
[1][2] Selected works include: Free scores by Didier Lupi Second in the Choral Public Domain Library (ChoralWiki)