LATIN DICTIONARYLexicon Latīnum
proper nounvariously declined, third declension, second declension

Trīnitās et Tobagum

Trīnitās et Tobagum f sg (genitive Trīnitātis et Tobagī)
Ecclesiastical[ˈtriː.ni.tas ˈɛt ˈtɔː.ba.ɡum]

Meaning

  1. Trinidad and Tobago (a country consisting of two main islands and several smaller islands in the Caribbean, off the coast of Venezuela; capital: Portus Hispāniae)
    Iucundo quidem animo cognovimus Eucharisticum ex omnibus Caribicae regionis Nationibus Congressum studiose apparari, qui proximo mense Aprili inter dies XVII-XX Portu Hispaniae, in urbe principe Civitatis Trinitatis et Tobagi, sollemniter celebrabitur.1997 February 7, Pope John Paul II, EPISTULA DATA BERNARDO FRANCISCO S.R.E. CARDINALI LAW, ELECTO MISSO EXTRAORDINARIO AD EUCHARISTICUM CARIBICAE REGIONIS CONGRESSUM, Vatican: Holy See, archived from the original on 25 Nov 2021:

Declension

declension
formsingularplural
nominativeTrīnitās et Tobagum—
genitiveTrīnitātis et Tobagī—
dativeTrīnitātī et Tobagō—
accusativeTrīnitātem et Tobagum—
ablativeTrīnitāte et Tobagō—
vocativeTrīnitās et Tobagum—

Origins

Partial calque of Spanish Trinidad y Tobago.

Quick answers

What does Trīnitās et Tobagum mean in Latin?
Trīnitās et Tobagum, a proper noun, means “Trinidad and Tobago (a country consisting of two main islands and several smaller islands in the Caribbean, off the coast of Venezuela; capital: Portus Hispāniae)”.
What is the genitive of Trīnitās et Tobagum?
The genitive singular is Trīnitātis et Tobagī. Trīnitās et Tobagum is variously declined, third declension, second declension.