The problem is to find a link from the poem to the man, other than the original post. His older brother Claude de Santeul (3.ii.1628 (Paris) - 29.ix.1684 (Paris)) [Parmi les quinze enfants!] also wrote poetry and hymns. No soap there either. Perhaps the original poem was in Latin.
Two of the many works available:
Santolius Victorinus: J.-B. Santeul, ou La poésie latine sous Louis XIV. 1855: