Khadija (خديجة) comes from the Arabic root kh-d-j, meaning "premature" or "early-born." The name's enduring weight comes from Khadija bint Khuwaylid — the first wife of the Prophet Muhammad, a wealthy merchant in her own right who employed him before she proposed marriage. She was the first person, after Muhammad himself, to accept Islam, and supported him spiritually and financially through the difficult early years of his prophecy.
Khadija is among the most honoured names in Islam, often given to firstborn daughters in tribute. Outside the Arab world it appears as Hadija, Hadiya, Kadijah, and other variant spellings. It is a name with quiet historical weight — borne by the woman without whom Islam might not have survived its founding decade.
Khadija 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 Khadija reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.