Thermaeus
Could not find Thermaeumque in Logeion dictionaries.
Thermaeumque Proper-name adjective: neuter vocative singular, Proper-name adjective: masculine genitive plural, Proper-name adjective: masculine accusative singular, Proper-name adjective: neuter genitive plural, Proper-name adjective: neuter nominative singular, Proper-name adjective: neuter accusative singular of Thermaeus
Thermaeus, -maicus, s. Thermē.
Thermæus (16) et Thermăĭcus sinus, m. , golfe Thermaïque en Macédoine : Tac. Ann. 5, 10 ; Plin. 4, 35 ; Mela 2, 35.