Mamaea (Julia Avita Mamaea, c. 180-235) was the Syrian-Roman empress — niece of Septimius Severus, mother of Emperor Severus Alexander, whom she ruled through for thirteen years. Killed beside her son when their soldiers mutinied.
Featured in Edward Gibbon's Decline and Fall.
Mamaea 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 Mamaea reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.