Thaddeus of Warsaw
Phillips ( 1940 ) , author of Isaac Nathan's biography , that the character of Thaddeus was based on Nathan's father Menachem Mona Polack ( Moses Monash the Pole ) who was thought to be the illegitimate son of King Stanisław August Poniatowski and his Jewish mistress Elżbieta Szydłowska . 
<triplet> Stanisław August Poniatowski <subj> Elżbieta Szydłowska <obj> spouse <triplet> Elżbieta Szydłowska <subj> Stanisław August Poniatowski <obj> spouse