Najia is from the Arabic نجية (Najīyah — intimate confidante, saved one) — from Arabic najā (to save/rescue). Najia is one of the Arabic feminine names — central to traditional Muslim heritage. Arabic feminine name reflecting Islamic salvation heritage.
Najia 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.
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In Pythagorean numerology the letters of Najia reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.