Phĭlŏmētor (noun 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.

Personal name
Confirmed occurences in the Roman Empire:

• Claudius Charidemus Philometor (Masc), ref: JÖAI 44 (1959) 142 sqq. | PIR ID4237
• Pythodoris Philometor (Fem), ref: PIR P 1114 | PIR ID11244