Tamiko is from the Japanese tami (民 — people) + ko (子 — child). Tamiko Cheri Sage — modern American figure. Tamiko Yamashita — Japanese-American librarian. Tamiko Hage — German-Japanese filmmaker.
Tamiko 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 Tamiko reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.