Blair is a Scottish surname from the Gaelic blàr, which means "plain", "field" or "battlefield". It was mostly a boys' name until the 1980s; the character Blair Waldorf in Gossip Girl, which started in 2007, cemented it as a sleek girls' choice. Blair entered the US top 1000 for girls in 2011 and has risen every year since, from number 606 in 2015 to number 169 in 2025.