Commentaire sur La Genèse 10:23

ובני ארם, the detailed list begins with Aram, the youngest of Shem’s sons, seeing that the previous verse had concluded with the mention of Aram. Perhaps Terach had married one of the daughters or granddaughters of Aram. This may have been the reason why Nachor called his own firstborn Utz, as well as his grandson Aram, to perpetuate the names of his ancestry.