Rivka is from the Hebrew Rivqāh (רִבְקָה — to bind, to tie). Rebecca (Rivka) is one of the four matriarchs of Judaism — wife of Isaac, mother of Esau and Jacob (Genesis 24-27). Her story — drawn from the well at Nahor by Abraham's servant Eliezer and chosen as Isaac's bride — is one of the courtship narratives in biblical literature. She is the matriarch buried at the Cave of the Patriarchs in Hebron alongside Sarah, Leah, Abraham, Isaac, and Jacob — one of the Jewish pilgrimage sites. Central to Jewish, Christian, and Islamic traditions.
Rivka 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 Rivka reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.