Amina is from the Arabic أَمِينَة (Amīnah — trustworthy, faithful, secure) + Hausa rendition. Amina is one of the Arabic + Hausa-Nigerian feminine names — central to traditional Islamic + West African heritage. Aminah bint Wahb (c. Queen Amina of Zazzau (c. 1533-c. Izu Ojukwu).
Amina 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 Amina reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.