Another Latin usage of "Y" was in diphthongs, where it combined with a vowel to create a blended sound. For instance, the Latin word "pauper" (poor) transformed into "pobre" in Spanish, where the "Y" contributes to the pronunciation of the diphthong "oy".
Furthermore, the letter "Y" was introduced to Spanish through Greek loanwords, where it was commonly employed for sounds like "i" or "u". For example, "mythos" (story or myth) turned into "mito" in Spanish.
Over time, the usage of "Y" was influenced by the historical evolution of the language, including changes in phonetics and the merging of sounds that occurred in spoken Spanish. Some instances where "Y" is employed can also be attributed to etymological roots and preservation of spelling, connecting Spanish words to their Latin or Greek origins.