The Flores historiarum of Bernard Guidonis names "Robertum" as youngest of the four sons of Philip IV of France, adding that he died "in flore adolescentiæ suæ" and was buried "in monasterio sororum de Pyssiaco" in August 1308.
Flores historiarum Bernard Guidonis menamakan "Robertum" sebagai putra bungsu dari keempat putra Philippe IV, menambahkan bahwa ia meninggal "in flore adolescentiæ suæ" dan dimakamkan "in monasterio sororum de Pyssiaco" pada bulan Agustus 1308.