Millena, a feminine given name of Slavic etymology deriving from the Old Slavic root milu, signifying “gracious” or “dear,” and subsequently semantically enriched by the Latin mille, “thousand,” occupies a distinctive position within contemporary onomastic studies. Its phonetic realization in Portuguese, [miˈjɛ.nɐ], and in English, /mɪˈlɛnə/, attests to its capacity for seamless adaptation across Romance and Germanic language systems. Empirical data from United States Social Security records reveal that Millena has sustained a modest yet persistent presence among the top 1,000 female names—registering annual occurrences between 5 and 16 and rankings oscillating from 844 to 983 over the period 1994–2019. The signification of grace and dearness inherent in its etymology, combined with its transnational phonological flexibility, renders Millena both an object of scholarly interest in academic onomastics and an appealing choice for parents seeking a name of measured elegance and cross-cultural resonance.