Beckham is from the Old English bæc (stream) + hām (homestead, settlement). Bend It Like Beckham (2002) — Gurinder Chadha's film starring Parminder Nagra and Keira Knightley; the title refers to Beckham's iconic free-kick style; voted one of the most-influential British sports films of all time.
Beckham 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 Beckham reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.