Modjadji is from the South African Lobedu Modjadji — Mo prefix + djadji (rain-bringer). Modjadji is one of the South African feminine royal names — central to Lobedu (Balobedu) Indigenous matriarchal heritage. South African feminine name.
Modjadji 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 Modjadji reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.