Bisi is a Yoruba name — short for Bisola, Folabisi, or similar names containing "-bisi," referring to being born during a festival or celebration.
Bisi Akande is the Nigerian politician; Bisi Alimi is the Nigerian LGBT rights activist.
Bisi 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 Bisi reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.