Lincoln is from the Roman-Latin Lindum colonia — "lake colony" — the English cathedral city in Lincolnshire. Lincoln, Nebraska — state capital. Lincoln Center — Manhattan performing arts complex. Future Mrs. Lincoln Park — celebrity baby naming culture.
Lincoln 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 Lincoln reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.