Lowri is the Welsh form of Laura — from the Latin laurus, meaning "laurel." The laurel wreath was the Roman crown of victory.
Lowri is widely used in Wales.
Lowri 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.
In Pythagorean numerology the letters of Lowri reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.