Nandini is from the Sanskrit nandinī (joyful, daughter, the sacred cow). Nandini Mukherjee — Indian academic. Nandini Manjrekar — Indian developmental economist. Nandini Sundar — Indian sociologist; Padma Shri (2007). Nandini Saraf — Indian author. Nandini Bedi — Indian fashion designer. Nandini is also the name of the Karnataka Milk Federation's iconic brand — one of India's largest dairy cooperatives serving 2+ million daily customers.
Nandini 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 Nandini reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.