Colombe is the French word for "dove" — from the Latin columba. Saint Colombe of Sens was a 3rd-century martyr in Roman Gaul.
Colombe is rising in modern France.
Colombe 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 Colombe reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.