Linthoi is from the Manipuri (Meitei) ꯂꯤꯟꯊꯣꯢ (Linthoi — blue, sky-blue). Linthoi is one of the Manipuri feminine names — central to traditional Manipuri Meitei Indigenous heritage spanning the Meitei kingdom (1110-1949 CE) Northeast Indian Indigenous cultural heritage.
Linthoi 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 Linthoi reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.