Keturah (קְטוּרָה) comes from the Hebrew qetoreth, meaning "incense" or "fragrance." In the Book of Genesis, Keturah was Abraham's second wife after Sarah's death.
Keturah is widely used in religious Jewish and Christian families.
Keturah 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.
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In Pythagorean numerology the letters of Keturah reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.