Mamello is from the Sotho (Sesotho) Mamello — patience, endurance, perseverance. Mamello is one of the Sotho + Lesotho feminine names — central to traditional Southern African Bantu Indigenous heritage spanning Lesotho + South Africa Free State + Gauteng provinces.
Mamello 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 Mamello reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.