Aminatta is the Mandinka feminine of the Arabic amin ("trustworthy"). Aminatta Forna (born 1964) is the Sierra Leonean-British novelist and memoirist whose work explores the legacies of war, particularly the Sierra Leone Civil War (1991-2002).
Aminatta 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 Aminatta reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.