. . . "Ruys, Pieter H.M. (Petrus Hendrikus Maria)" . . "Petrus Hendrikus Maria Ruys" . "P.H.M" . "Pieter H.M. Ruys"@nl-NL . "Hendrikus Maria" . "P.H.M Ruys" . . "P." . "P. H. M. Ruys"@fr-FR . . "Petrus" . . "Ruys" . "H. M." .