Ottilie comes from the Germanic aud (wealth, fortune) and hild (battle) — meaning "fortunate in battle." Saint Odilia (660-720 CE) is the patron saint of Alsace and of blindness.
Ottilie is rising in the UK and Germany. The British actress Ottilie Patterson (1932-2011) was a notable bearer.
Ottilie 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 Ottilie reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.