Julie is the French form of Julia — from the Latin Iulius, the gens (clan) name from which Julius Caesar took his name, possibly meaning "youthful" or "of Jupiter." A top-15 US baby name from 1965 to 1976, peaking at #10 in 1971. Her three-octave coloratura soprano voice was permanently damaged in a 1997 surgery for non-cancerous throat nodules; she sued the doctor and won an undisclosed settlement. Dame Commander of the British Empire (2000). Weasley in seven Harry Potter films, Mamma Mia!.
Subject of Andrews's memoir Home Work (2019).
Julie 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 Julie reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.