Eugenia is the feminine of Eugene — from the Greek eu-genēs ("well-born, noble"). Princess Eugenie of York (born 1990) — daughter of Prince Andrew and Sarah Ferguson; younger sister of Princess Beatrice; her 2018 wedding to Jack Brooksbank was attended by 850 people and watched by 5.3 million British TV viewers. Eugenia Cooney (born 1994) — American YouTuber; subject of significant public concern regarding her eating disorder; her platform has been studied in psychology and digital-media research. Saint Eugenia of Rome (died c. Eugénia Magalhães — Brazilian musician.
Eugenia does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Eugenia reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.