Tria

Perhaps a short form of DEMETRIA and other names ending in a similar sound.

DEMETRIA   female   Ancient Greek, English
Feminine form of DEMETRIUS.
DEMETRIUS   male   Ancient Greek (Latinized)
Latinized form of the Greek name Δημητριος (Demetrios), which was derived from the name of the Greek goddess DEMETER (1). Kings of Macedon and the Seleucid kingdom have had this name. This was also the name of several early saints including a Saint Demetrius who was martyred in the 4th century.
DEMETER (1)   female   Greek Mythology
Possibly means "earth mother", derived from Greek δα (da) "earth" and μητηρ (meter) "mother". In Greek mythology Demeter was the goddess of agriculture, the daughter of Cronus, the sister of Zeus, and the mother of Persephone.
OTHER FORMS
ANCIENT GREEK: Demetria, Demetrios, Demetrius
BULGARIAN: Dimitar, Mitre
CROATIAN: Dmitar
ENGLISH: Demetria
FRENCH: Dimitri
GREEK MYTHOLOGY: Demeter
GREEK: Demetrios, Demi, Dimitrios, Dimitris
HUNGARIAN: Demeter, Dömötör
ITALIAN: Demetrio
MACEDONIAN: Dimitar, Dimitrij, Mitre
MEDIEVAL SLAVIC: Dmitrei
PORTUGUESE: Demétrio
ROMANIAN: Dumitru, Mitica
RUSSIAN: Dima, Dimitri, Dmitri, Dmitrii, Dmitriy, Dmitry, Mitya
SERBIAN: Dimitrije, Dmitar
SLOVENE: Dimitrij, Mitja
SPANISH: Demetrio
UKRAINIAN: Dmytro