Danuta is from the Polish Danuta — possibly from the Lithuanian Danutė (gift, given) or the Slavic dan (given). Danuta is one of the Polish feminine names of the 20th-21st century. Polish feminine name reflecting Solidarity-era heritage.
Danuta 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 Danuta reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.