Kartika (Sanskrit Kṛttikā) is the constellation Pleiades — also the Sanskrit name of a month. In Indonesian, used as a feminine name.
Kartika Affandi (born 1934) is the Indonesian painter, daughter of the famous Affandi.
Kartika 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 Kartika reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.