Skylar is the Anglicised modern form of the Dutch surname Schuyler, meaning "scholar" — the same surname carried by Eliza Schuyler Hamilton, wife of Alexander Hamilton. The name became phonetically associated with "sky" in contemporary English use, which has helped its modern rise.
Skylar has been in U.S. records since 1990 and has been rising steadily. It is unisex but is used for girls roughly 70% of the time. Today it sits in the U.S.
Skylar 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 Skylar reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.