Jedda is from the Australian Aboriginal jedda — wild goose (also sometimes small wild bird) from Western Australian Yamatji + Murray River dialect. Jedda is one of the Aboriginal Australian feminine names subject of the Jedda (1955 dir.
Jedda 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 Jedda reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.