Sofya is the Russian form of Sophia — from Greek sophia (wisdom). Sofya Kovalevskaya (1850-1891) was the first woman in modern Europe to earn a PhD in mathematics (Göttingen, 1874, summa cum laude) — and the first woman appointed a full professor of mathematics (Stockholm, 1889). Her Kovalevskaya top is one of only three integrable cases of the spinning top, alongside Euler and Lagrange. Also a novelist and playwright. Died of pneumonia at 41.
Subject of Don H. Kennedy's Little Sparrow (1983).
Sofya 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 Sofya reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.