Thomas Périz de Fozes (or Thomas Periz in the original orthography) was an Aragonese troubadour of chivalric nobility, who left two poems in the Occitan language. Their mother tongue was obviously the Aragonese. Its Occitan was the literary koiné of the classic era of the troubadours (1160-1220) and apparently the language was learned: in general, its language is grammatically and rhythmically perfect, apart from a few errors of declination caused by its greater familiarity with the Aragonese.

Thomas is mentioned among the barons of Aragon in a sirventés of Joan de Castellnou, which is enough to show that he was considered an example of the practice of courtly love between the years 1339 and 1343. In 1339 he was advisor to Pedro IV de Aragon, who appointed him administrator of the Valley of Aran and Castilian Castell-lleons. Through his brother, Artal de Fozes II, married to Esclaramonda, daughter of Jaime III of Majorca, Thomás was related by marriage with the house of Aragon. The second wife of his brother (1371) and widow, Sibila de Fortiá, was mistress and then wife (1377) of Peter IV.

Thomas tried to use his influence in court to benefit his relatives, when he wrote a poem early in 1342, Trop me desplay can vey falir, asking the King for mercy to James III, whom he had deposed. He admits the pride and infidelity of Jaime, who had refused to swear allegiance to Pedro, but urged him not to lose everything for a moment of madness. Finally, he mentions the magnanimity of the paternal and maternal lineages of Pedro, who gained the name of "Benigno" to his father Alfonso IV, in a direct request to the king so that it pardoned the life to his vassal. Finally, Jaime III died in Batalla de Lluchmayor in 1349.

Thomás' second poem, Si col vassayl can servex longamen, is a song dedicated to a Na Resplendens mentioned in the second tornado of his earlier poem. This senhal (name in code) refers to an unknown lady of high rank. The main theme of the poem is the poet's need to "live the moment" (carpe diem):

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