Manjeet is from the Punjabi man (mind, heart) + jeet (victory, conquest) — conqueror of the mind, one who has mastered the mind. Manjeet is one of the Sikh + Punjabi unisex names — central to traditional Sikh + Hindu Punjabi heritage.
Manjeet 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 Manjeet reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.