Lewis & Short

Phĭlŏmētor, ŏris, m., = Φιλομήτωρ (mother-loving), an appellation of Attalus, king of Pergamus; and also of the sixth Ptolemy of Egypt, on account of his love for his mother Cleopatra, who had ruled the kingdom well during his minority, Just. 34, 2, 7 sq.; cf. of Attalus, Varr. R. R. 1, 1, 8; Plin. 18, 3, 5, § 22; Vulg. 2 Macc. 4, 21.