Hendrix is the Dutch form of Henry's surname — Hendrik's son. Hendrix Wakefield — modern American celebrity baby. Wynton Hendrix — modern American figure. Beyoncé and Jay-Z's son Sir Carter (born 2017) has Hendrix as cultural significance.
Hendrix 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 Hendrix reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.