Lourdes is named for the French town of Lourdes in the Pyrenees, where in 1858 a 14-year-old peasant girl named Bernadette Soubirous reported eighteen visions of the Virgin Mary at a grotto. The site has since become one of the most-visited Catholic pilgrimage destinations in the world, particularly associated with miraculous healings.
Lourdes is used as a girl's name particularly in Spain and Latin America. The pronunciation is one syllable in English (LOORD), but the original Spanish has a softer two-syllable feel.
Lourdes 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 Lourdes reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.