In his recent article, "Ptolemaios der Sohn", Werner Huß (1998: 229-250) has made a detailed study of the evidence relating to Ptolemy "the Son", asking the vexed question: "Wer war dieser 'Sohn'" All that is certain about this "Son" is that he was the co-regent of Ptolemy II Philadelphus from 268/67, when his name first appeared in the preamble to a documentary papyrus (P. Sorb. inv. 2440), until it was omitted from such preambles after April/May 259 (P. Cair. Zen. 59003) after he had rebelled against his father (Trog. Prol. 26). By uniting the available papyrological, inscriptional and historical evidence relating to Ptolemy "the Son" and combining the various Ptolemies who appear in these sources, Huß has made a reconstruction of "the Son's" career that he himself concedes is by no means certain (1998: 229). However, he has reached a number of conclusions as to the identity of Ptolemy "the Son", and in the following discussion an alternative view will be offered.